My ex husband passed away....

Me and my ex husband had a complicated relationship but it ended okay. We just fell out of love with each other. We barely spoke to each other and did our own thing. I found out he was cheating on me with his best guy friend and I use cheating VERY loosely because we had emotionally let each other go. We hadn't had sex in 2 years. Emotionally we just weren't together anymore so I didn't care when I found out about his "affair". I started college and moved on with my life and he moved on with his. We just were still married and living together. Well his best friend/boyfriend died by getting shot in the park... I found out from a Facebook post and showed my him and he completely shut down for 3 weeks. I kept doing are you alive checks. And eventually I went in there to talk to him. I did tell him I knew and comforting him about the death. He admitted he had fallen in love with him and again it didn't hurt me because emotionally we let each other go. We way later on had the divorce talk and it went well. We split everything. I got the house and he took the RV. When the papers were finalized we actually laughed outside the court house and he said "Take that our marriage!" We hugged goodbye and went our separate ways.... Yesterday I found out he died from getting hit by a semi... I've been crying and can't stop... His family invited me to the funeral. Would it be weird if I go? I just hope whatever after life he is in he's happy and that him and Joel(best friend/boyfriend) meet again because at least then he's not alone.