Long story short, there's this girl in my social circle I flirted with lately. I know for a fact she likes me and enjoys my company(or at least used to). Asked her out, she said yes.

Went out of the place for a cigarette and saw another guy(which was more or less drunk) holding her by the waist, she didn't back off, even though i was there.

I was a bit upset after this, then completely ignored her for the rest of the evening. When she left, she came to hug me, as usual, but I only half ass hugged her back and said bye.

Should i even bother any further?