OLDER BOYS

I don't know what to do. Lately I have been attracted to older guys. My last relationship was when I was 14 (last year) and he was 16  which wasn't so bad. My mom doesn't like me dating older dudes but I volunteer at a skating rink and I am starting to like a coworker. I'm 15 and he is 19. I keep telling myself that I shouldn't like him because of the age difference but he is just so attractive and nice! Plus, at school, there is another 19 year old that seems to have an interest in me but then again, TOO OLD! Has anyone gone through something similar like this? What should I do?