first love...

I've dated with a guy for 6 years and 3 months and then we broke up, after that I've never been able to love someone like I loved him, I can't "do" relationships after that... and I'm not over it yet, it's been 4 years since we broke up, I talk to him sometimes and my feelings for him doesn't disappear, they're becoming stronger... will I ever be able to forget about him?