So if I can't find love in my youthful moment, how valuable will it be when I find it in old age?
You mean how unnecessary it’ll be in your in your ‘old age.’ You will have missed something amazing, often productive, but it’s not for everyone. As you age, there’s less a need for intimate companionship. Solid friends, lasting family, and finding your niche in the world may end up enough. The world is not hurting for lack of humans.
The problem with love in my seventh decade is not what most young people probably imagine it to be ... that one's gnarly old arse can barely get it up anymore ... which isn't necessarily so. The problem, if you can call it that, is that you know too much ... the romantic illusions of youth don't work on you anymore. Even if you avoid the trap of being cynical or bitter, it's not as much fun. However ... you avoid a lot of drama and whatever relationship you have tend to be more substantive and sustainable and realistic.
In other words when you finally get to the point in life that you're truly comfortable in your own skin, happy alone, and firmly centered, such that you don't pine for a relationship thinking it's going to fix all your problems or make your life better, you can, paradoxically, make far better judgments of who you want to be with, and have more enriching relationships. Or at least you can if you've grown throughout your life and aren't some case of arrested development, so that you're an examplar of the old saying, "there's no fool like an old fool".