When a guy stands really close to me, does it mean anything?

Anonymous
I find out that my ex boyfriend like to stand very close to me. Especially when I'm talking to someone, he would stand up close behind me and look at who I was talking to. When I turn around I was like "whoa! that's a bit close" Anyway I don't mind it as I like him. Last week, while I was talking to someone suddenly he lean forward to join in the convo and his face was right next to mine. I think our side face was like 2inches apart. His hand was pretty close to mine too as I can feel the hair on his arm against me. Does he like me or what?
When a guy stands really close to me, does it mean anything?
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