Another drama filled family event

Okay so I went to my nephews birthday party yesterday. That was extremely uncomfortable. My mom told both of my brothers of the argument that we had concerning her not telling me about my woman issues. I have worked for 5 years to get a relationship with my brother. This all started just after my dad died. My sister in law accused me of saying something that I didn’t say and EVERYONE (mom, brothers, aunts, uncles etc. ) EVERYONE believed her so I stood alone with everyone pointing their fingers at me. This has messed me up emotionally big time. And I have wasted several years of my life worrying and freaking out about my family. We finally patched things up several months ago and I was experiencing the relationship with my brother that I have always wanted to have. And then my mom tells him about our argument (I personally have kept my issues with my mom, with my mom and no one else) I am again on the shit list. But back to my nephews birthday party. My brother told my mom to tell me that I was not allowed to start any drama while I was there (I have never done so). So while at the party, my brother only talked to me in short sentences, and with no eye contact. It was great, I think I am going to just start sending presents in the mail. I love my nephews, but this is occupying too much of my life. And I have a life to live.