I can't shake this heartache after only 2 months together!!!!!!?

This is going to sounds strange.... and maybe it is but I can't seem to shake the way I'm feeling. I was w/ my ex-bf for a 2 months. We "clicked" right away and it felt like we knew each other all of our lives. It was INSANE I know but a few weeks into it we were talking about 'our future". We were both in agreement that it was CRAZY but it's just the way we felt. He is 20 and I'm 26.... we are in different stages in life. I work full time and have my evenings/weekends free where he is a full time college student who works 2 part time jobs trying to make ends meet. He's has the type of personality where he gets sressed out & overwhelmed easily and doesn't seem to cope well w/ it. Anyway.... almost a month ago it just all got to be too much for him and he ended things. He felt he couldn't handle everything on his plate and balance everything (he was single for 2 years before me). He also made it very clear that he is terrified of how serious things got so quickly...........