My Boyfriend Trauma Is Getting The Better Of Him

My sister is getting married and I'm a bridesmaids. I really want my boyfriend to come to the wedding but its in his home town(her fiance is from his home town). He has severe trauma from his home town. He lived with him mom, step dad, and four step brothers. His mom was a junkie, step dad was super abusive, and step brothers would take turns "using his body " (he hates to use the word rape when it pertains to him). This went on from age 8 to 16 when he ran away. He was homeless for a few years. I told him he needs to concur his fears and not let what happened to him stop his him from attending his SIL wedding. He said he's not going back there or taking the chance of running into his "family". I tried to let him know he's a different and stronger person. He told me to shup up about it and proceeded to bang his hang on the wall. He ended up having to make an early therapy session because the conversation stressed him out. I wasn't trying to upset him, I just really want him at this wedding and don't want him to let him trauma consume him.