Help !

I’m 18 and in college before I go back I have the high school crush I always wanted to be with but I don’t want to disappoint him ! Ive had one night stand and 1 boyfriend b4 but I never climaxed before ( cum ) . Starting to feel like something is wrong with me ! I don’t want to mess this up with my crush when I get the chance before I go back to school what should I do ?!