What should I do

I’ve been friends with this guy for a lil while and we flirted a little bit in the beginning but never anything serious and I found out he was talking to somebody 2 months ago. I recently met her and everything .

Well me and him planned to go to out the country for our bday month before I knew of her and now I’d feel bad if I went on a trip with him even tho he says “they are not official” and we won’t be doing anything wrong

True but we’ll be out there a few days and I know it’s going to be drama cuz I wouldn’t want my man (if I had one) and his female friend together out the country

but the tickets have already been bought . And if he buys her a ticket Im not sure I’d want to third wheel . He said he’ll talk to her about it but What should I do ??