AITAH Partners friend disrespected me

So my partner has this gay friend who's clearly into him and has been for a long time. We hung out all together Sunday and this friend completely ignored me and literally pretended i did not exist, and walked out and smiled when he heard me talking to his other friend about it and its not the first time its happened especially where he found it amusing i was upset. Hes ignored me irl 2x now and everytime my partner has called him. AITAH by being angry that he hung out with him today when said friend literally just disrespected me the other day on top of all the other times?

Note:

Im the only reason partner and this guy are still friends, he also spoke to my daughter, partner and other friend

2nd note: This guy has made passes at my partner and written him a love letter of which my partner rejected him.