Guys or Girls help please!

How can i tell if a guy likes me. I find it hard to tell whether they are looking at me or looking past me so i never know if a guy is trying to get my attention or not.
Also if a guy randomly starts telling you stuff about his life ect what does it mean, is he just being friendly or what ?
Thanks in advance X

If he somehow slips anything sexual out his mouth or is trying to show you they are cool/show off, then they like you.

Okay, so if a guy told me how he was passed out underneath a bar at 4 am would you say that is just general chat?
If a guy started talking about what they do at home which i have interest in what would be your opinion on him?
x

The bar one maybe trying to make you laugh, the thing about telling you what your interested in is also a sign of someone liking you.

From the guys im friends with and my personal opinion, if you dont like a girl you dont spend much time with them.