<human>: Could you distill the essence of the text into 1-3 sentences?

So I broke up with my girlfriend of almost 3 years. We were both previously divorced. She changed as a person, started giving me a hard time about working late and hanging out with my friends. Decided to end it. My ex-wife was controlling and I was a little bitch who let her. I promised myself that I would never be controlled in a relationship again. 

I manned up, met her in person, apologized and said that it wasn't working out and that I wished things were different. Broke up 3 months ago. There was no cheating (that I am aware of anyway!), no abuse from anyone... it just wasn't right anymore - we barely even fought. I went no contact since that time. While she has texted me a few times since, I have not responded. 

The problem:

Her brother was a casual friend. I was in a band with him for a bit a bit and he is friends with some mutual friends as well. I also go mountain biking with him and other friends. His wife set me up with his sister. I didn't know it was his sister, she just called it a blind date. I found out on that date, but I was having a good time and decided to continue on. I don't think I would have gone on the date if I knew it was his sister.

I found out from a mutual friend that he is pissed at me and refuses to hang out with me in the future. 

My question is, should I contact him and try and smooth things over? Or should I just continue to let things settle down? I wasn't mean or anything during the break up. I have a feeling his wife is just being a jerk. I just don't want to cause problems between the rest of the few friends I have and barely see. I am alone most of the time when I don't have my boys with me and don't want to lose more friends. 

Any advice is super appreciated.
<bot>: Broke up with Girlfriend. Her brother was a friend longer. He is pissed. Should I talk to him? Not sure what to say to try and smooth things over.