(I'm European, English is not my first language so it won't be perfect)

Yesterday me (21M) and two friends of mine were having fun at the beach playing volleyball when I saw this beautiful girl.

Two hours pass by and she already gave me some IOI's like checking me out several times, smiling to me, and getting closer to me and my friends. So before going home I decide to approach her.

We have a little chitchat (her friend was near her for the whole conversation) and after I say that we two could hangout sometimes she immediately says "At the moment I have a boyfriend BUT..." and doesn't finish her sentence. So I gave her my number (I didn't have my phone atm) and I tell her to call me (so that I could have her number too) so that I could send her a message and we will see what happens after that.

During the day I didn't receive any calls or messages from her. No biggie.

At night I went out with my buddies and I see her with her bf and right when she walked in front of me she hugged him. Lol.

Why did she get my number if she didn't have any intention to message me? And why did she try to make my jealous by hugging his bf?

Anyway, since we apparently go out to the same spot it's pertty likely that I'll see her again. Do you suggest I say something next time i'll see her?

Thanks