i don’t think that that’s a big age difference. if he’s 18 and you’re 15, depending on where you live, sexual activity could be illegal. if he’s in college and you’re in high school, it’d be a little different because they’re two different stages of life. that’s not to say it’d be impossible to make it work, that’s a normal age difference, just that it matters more when you’re younger. talk to him about how you’re feeling, try to convince him that you both can make it work because you have so much in common and it’s not really that much of an age gap. if he still doesn’t want to be in a relationship, then you should move on to someone that wants the same thing that you do.