How do you know when a guy likes you?

BoyToysAndHairDye
I have this friend. I like him. A lot. He might like me... he's single. He tends to exaggerate things a lot... it seems like he's trying to impress me. The only thing that's keeping me from thinking he likes me is because I'm kinda fat and ugly lol. Help? Thanks!
Updates:
+1 y
A lot of people also say he likes me. He sits with me all the time, and he ALWAYS wants to talk to me if he could talk to someone else.
How do you know when a guy likes you?
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