Firstly, you should try to see his personalities, but not in a creepy way, see what do you and him have in common and then start to make a conversation. I'll tell you what did I do to get close to my crush even we are in different Uni. basically I saw this guy for long time but just had a chance to get close to him. so I look at what we have in common, so first thing is that we work part time in the same industry and he came to my shop for food regularly then I just acted like I noticed him then I tried to put myself in the situation where I can meet him then I asked for his IG on the second meet. and now we hangout more often. it is all about how natural you act, tbh just don't move too fast.