WWYD?

Please give me your opinion.  So, I know this guy, who is young enough to be my child.  Him and I worked together for a very brief time and during this time we became pretty good friends.  His fiance always had a little jealousy, which was odd, considering he is just a little older than my child.  So, I already knew his fiance before him and I knew her family and never really liked them.  I lived next to them before and they are the type who gossip to you about everyone and are talking about you before you can even get out their front door.  Regardless of that, since my coworker was engaged to her, I was always nice to everyone, never really let them know I didn't care for them.

So, he left the job I was at, but he stayed in touch with all of us on our job.  He would come by to visit and such.  I could always tell by statements that he made that his fiance would talk smack about me, but he never said it to me, he would smooth over whatever she said.  Okay, so they are planning their wedding and asking for help.  He called and asked me to do a task with tying ribbons and asked to meet me at my house at a certain time.  I waited THREE HOURS for him at my house and he never showed, nor did he respond to my texts.  Three days later, he called and said he didn't bring the stuff by because his fiance started yelling saying she was tired of him trying to get everyone to do their wedding stuff, so he just did the ribbons himself.  Keep in mind, several of my coworkers are doing odd crafts for the wedding and their jobs weren't taken or anything.  But, he asked me if maybe I could help serve the punch and I said okay, I would.

Then, last night he calls me and I could tell he was uncomfortable talking to me and he asked if my husband and I would mind being the CLEANUP CREW for his wedding!!!  No serving, no arranging, but just cleaning up.  I initially told him okay, but about five minutes later when I thought this through, I called him back and told him no, that I just realized I had something else to do and wouldn't be attending the wedding at all.  He knew I was lying and kinda questioned me about it, but I felt so degrated by him.  I mean, I know this girl's family doesn't like me, but how do you ask someone who is just a very short-lived coworker, turned into somewhat of a friend, but not super close to CLEAN for your guests at your wedding.  It would seem to me that one of their mother's would have taken that task or something.  Also, I know for a 100% fact they wouldn't clean for me at any event, because they tend to act like they are a little better than others and that makes me mad as well to ask me to do something that I know they wouldn't do for me.

So, would you have had the same reaction or am I crazy?  My present coworkers don't really agree with me not going to the wedding and are like "Well, you know he's young" but I don't even see that as a young comment.  I see it as him acting just like his fiance's parents, who don't really like me, and being very rude to me and my husband.  I feel like I honestly don't mind cutting him completely out of my life, because I don't like negative people.  I wouldn't be rude in public to him or anything, but just not talk to him on the phone anymore or attempt to be friends with someone like him.