@mimzie123,
Hahaha! A bit younger guy speaking (27)
How to get intimate with a guy if you are a girl and he is shy? Very easy! Ever heard of "Netflix and chill"?

Just invite him to some private, romantic area - best to your or his flat, open a bottle of champagne or smt. (drink a little bit, it helps a lot

) lie on the bed, watch a movie and let the magic happen
I am not saying this is manual to have a sex with guy, if you want kiss, allow him kiss. If hug, than hug. But he will feel much more comfortable and braver here than in some public place
when he told you he is busy with school, I think he was telling truth. Or had other job that did not want you to know about. His feeling for you probably remained unchanged. Don't feel insecure, your doubts can make things only worse, never better. Feel the life instead of overthinking it