So I go out with my friend to meet his friend (a girl he has been hooking up with and will certainty hookup with again) and her friends. I'm introduced to her friends, there were many to choose from, and I'm talking to one of them for a bit. She seems interested for a bit but eventually makes an excuse to leave and go talk to some other friends after I ask her to dance. I assume she's not interested. Now I'm alone while my friend is making out with the girl he came to see. I don't know ow anyone and I feel extremely anxious. I make excuses to go to the bathroom and eventually leave the bar because of the anxiety and the overwhelming feeling I look like a weirdo just lurking alone.

Can someone please expose some tips for this type of situation and how to approach being alone at a bar without looking like a loner or weirdo just lurking.