How do I know if someone’s into me?

I’m a straight.. or so I thought?

There’s this guy that comes in with his friends and sometimes his parents at my work.. for context I work at a bar doing night shifts.

So this guy is being really friendly to me.. and I’m not sure if he’s gay or bi or straight.

He got my IG account and we’ve been exchanging messages there.. at first he initiates that chat.. but recently I’ve been messaging him.

He’d ask me what I’m up to.. or if i’m working etc.

Recently he’s been coming in by himself and he would talk to me about things that are deeply personal.. like him exploring his sexuality and things like that.

Whenever I see him coming in at work we’d do a dap handshake.. you know.. like what usually bros do.

But when he gets drunk.. he’d start to be really clingy.. he’d follow me into the bathrooms and will chat with me there.. he’d use the urinals but also tilt a little bit that I’d be able to see his dong if I look at it. Then when it’s time for him to go.. he’d give me a hug.. not a casual hug but one where I can feel his hands on my back and his chin on my shoulder.. and then dap me up again.

He doesn’t really act gay or feminine so I’m really confused.. but he did mention in chat that he’s got a girlfriend.. but one time his friend slip up that he’s never met his girlfriend so i’m not sure if the girlfriend is real or he’s just saying that to see how I react.. I’m jealous if i’m being honest but I would never let him know that.

I think I like him.. i’m not sure how I feel.. I like when he’s around.. and I like the attention he gives me.. i’m really confused.