Please Help! I need advice on what to do.?

[kawaiijas]

So me and her boyfriend had a thing before they started dating. We were going to date but his friends scolded him because he was in the 9th and I was in the 8th grade. Fastforward to now he has just been doing wierd things ex: grabbing my waist, trying to make me smile, when his girlfriend isnt their he acts as if im her and him and when all of us are around he only looks at me or plays around with me. I know he likes me because I heard one ofhis friends saying he wanted to be with me. It just puts me in a wierd situation because his girlfriend doesnt like him very much she is only with him for pictures on social media. WHAT SHOULD I Do?
Btw: thanks for reading.

[Ronette]

You suck. Messing with someone's BF. How do you know whether she likes him or not? Its females like you who guys only use. Sorry but you should have morals....What if the situation was turned? what if you were the girlfriend? Karma is a bitch....

[Sam]

You should do nothing. He is in a relationship. Let him make the moves.

He has more on his plate. Don't knock it off the table and shatter it for him, her, and you.