Try to be straight up with her, maybe say something like “you know I don’t believe in that stuff and I’m starting to think you keep mentioning it intentionally. I’d feel better if you stopped.” Her feelings are important but if y’all are good friends she ought to show concern for yours too. Maybe she’s unaware of how you feel and all it takes is you telling her. Try to start off by giving her the benefit of the doubt, she might think everyone who hears that stuff feels good because she feels good when she hears it?

She obviously doesn’t respect you. Is that a real friend? Tell her, don’t ask her, to knock it off. If she doesn’t, say goodbye.

It's harassment. But the good news is the bible gives you plenty of material to throw right back.

She's trying to "save" you. She's pretty much telling you that you are lost and misguided and destined to burn in hell...........unless she can show you the error of your ways.

I have friends that do this, as well. I usually respond by adding a Bible verse containing some atrocity committed by Yahweh or one of his followers, such as Elisha and the she-bears, or Abraham pimping out his wife to Pharaoh. The Bible is full of stories showing what an asshole the main character can be.

Have you asked her nicely but firmly to stop including religious things in her texts to you? If not, I would let her know that you’d like her to refrain from any religious talk because you’re not interested in hearing about it

She's no friend. Friends accept you as you are, and don't try to manipulate you into agreeing with them. She doesn't respect you, or your beliefs. She thinks she's better than you because she believes and you don't.
If it were me, I'd cut her off with no remorse.

You can block them because they don't respect your views on religion.

This one scream all over the place that you need new friends....

Hmmm this sounds like this could be a tough one , your friend sounds lime the type that breathes,drinks,and eats her religion, in other words just can't stop mentioning it!, one thing you can Is to ask or say look im well aware your religious but honestly it isnt necessary to say Jesus loves me in your texts to me, i mean its like your deliberately doing it to annoy or put me down. Just try and say it in a way where it isnt offensive and it turns into a mountain

Or respond with any blasphemous memes you can find

Tell her what you just told us. Tell her to stop messaging you Jesus crap. You do not share your Atheist crap with her so she should stop sending Jesus texts to you.

She doesn't respect you....and respect among friends should be always present.

Next time she says it you could reply with "I couldn't care less" if there's one thing that annoys theists it's apathy.

Send them atheist texts. When they sneeze say, “nothing happens when you die”. It’s bullshit that they can be like that without the fear of repercussion, but we can’t. It’s offensive to them if I do that, and they should practice the same amount of courtesy.
My sister in law did that EVERY TIME. I’d say what’s up?! And she say “God is Good!” Finally I said fuck off and I don’t talk to my brother and her anymore.

Send them devilish texts until they get the message.

find new friends.

If someone knows that something is bothering you then they will do it for spite. Don't say anything and it will go away. Go to Pinterest and find some non spiritual posts which you don't have to send to her specifically but post them where she can see them.

I would feel sorry for anyone who could not relate to me (a non-believer) without mentioning Jesus. She needs to get a life that matters.

Make an appointment to meet her and turn up with a colander on your head and a faraway look in your eye. Waffle on about the Flying Spaghetti Monster and how His touching you with his noodly appendage has changed your life. Offer to take her to meet the local FSM group and have spaghetti etc. etc.
See how she likes it.
Alternatively, tell her to fuck off!

It will continue until you take actions to discourage it. If it offends you (it would me), say so. It can be done politely... or NOT. Whatever it takes.

Call her out. Say something like....

You - "Do I treat you with respect?"

Her - "Yes. Always why?"

You - "I feel disrespected when you give me of your faith, especially when you know I'm an atheist"

Her - "I'm sorry. I never thought of that"

You - "That's OK. Please respect my atheism the way I respect your faith".

This might not work thought

If you have asked her not to do that then It is a form of mild abuse. Trying to guilt you into questioning your non belief. It is at the very least annoying and disrespectful.
I had a couple friends continue to try to talk Jesus to me after I came out as atheist. I told them I like them and would like to continue being friends and talking with them but they would need to stop with the Jesus tal and the guilting because it was not going to work, that it has the opposite effect on me. They got the message and we still talk so that is what worked for me.

If I had a friend who suddenly started texting me with god stuff I'd be worried about their sanity but all you can do is ignore it, it's all meaningless if well intended (I hope) If your friend really cares then cool, if there's a god component to that care I would suggest that you're not leaving anything behind that you need if you put a bit of distance between yourselves.

When you end an email, tell her that Satan loves her. When she complains tell her that you will stop when she does.