AITAH for not allowing my husband to go to a birthday party invite from his new friend?

So my husband met 3 new friends at work 6 months ago and did something stupid and got too close to one of them to the point where we almost got divorced. This led to one of his 3 new friends not liking me just because I ruined the friendship they’re building. This friend also disrespected me and was rude to me when I tried to talk to him about my husband and one of his friends. I was just trying to get the whole picture, that’s why I want to talk to him about what’s really happening by that time because I feel alone and everyone is on my husband’s side and I’m starting to question myself even if I have evidence of his infidelity.

Now, this friend who doesn’t like me invited him to his daughter’s birthday and asked me if he can go and I said no. We got into a fight and asked him why would you sit on a table where I’m not respected? Also why would you value them than our marriage? I’m not even fully healed on what he did to me.