We just going to be friend. Which I have bad feeling we won't be together.

Stop harassing them and find someone interested.

Give up and move on. You can't force feelings.

It depends on how great the gap is and how serious the feelings are. If its a work relationship, be very careful, there are laws that complicate these kinds of relationships. In an ideal world, ending the relationship would resolve the mismatch, but we don't live in such a paradise. Honesty might solve the issue as in "i want to be more than just a friend to you, how would you feel about a more serious relationship?". At least this may clear the air, or it could spoil everything (not a perfect world, you see). Time might resolve this best, be kind, be patient and be ready to accept the outcome.

If that's all you want with them, give up and move on. It is likely them and not you. Give yourself the time you need to get over them and then try again. You deserve someone who will appreciate you for who you are.

You just have to live with it. Being "friend-zoned" isn't such a bad thing if you can bear knowing they'll never love you - at least that way you can still enjoy their company, and friendships are valuable. If you've really fallen for them and it's too painful, sometimes you've just got to try to avoid them and concentrate on other things in your life.

Honestly, it's best to just move along.