Please help

I have a confession to make. I’m young, 18. And I’ve dated people before, nothing serious. I started dating, hooking up, whatever you’d call it, this guy (let’s call him C) a little over a year ago. We’re still hanging out. Thing is, I fell in love with him. I mean head over heels in love with him. Which is really, I don’t know, abnormal for me? I guess? I don’t really catch feelings and shit too easily. We split up for a little bit and it absolutely crushed me. I’ve never felt so much outstanding pain im my life. It went on for months. Then we got back together and it went away. I know he doesn’t feel the same way. And that’s fine, I was never expecting him to. I’ve obviously come off of my feelings a little because there’s no use in me wasting my energy on someone who won’t do the same. I’ve started talking to this new guy, named T. He’s super sweet, treats me real good, but I’m so scared I’m not gonna be able to let go of C. I understand that I’m young, and that this sounds really pathetic, but I feel like there will always be a small hole in my chest from where he was supposed to be. I find myself wanting him when something goes wrong, or I’m super upset, I want his shirts that I’ve felt for so long, and I want to smell him (sounds weird) because it’s so comforting. I don’t know if I’ll ever be able to fully get over him, and I really do fear that I’ll go my whole life feeling a small touch of pain in my chest when he’s mentioned. I don’t know if I’ll love him so intensely my whole life, but what I do know is that I need him. I need him in my life, and I’m scared of the outcome when that doesn’t happen