Wedding Related - need suggestions please...

I was invited to a wedding that my ex boyfriend will be attending with his new fiance and his immediate family. I dated this guy for 3 years, and almost got engaged to him.

The snag is that there is a moderate amount of bad blood between me, the ex's entire family, and his new gold digger... I mean fiance.

Though I have moved on - I clearly have pent up anger towards the entire group. I would love to avoid the whole scenario, because it will just makes me tense and brings back ugly memories. I know I should be able to go, but I would rather not.

My FH likes to be the stand up guy, and says I should be able to go to this wedding regardless of what happened. He is giving me guilt that he would like to attend this wedding with his FW, but he is willing to go alone. Plus - the couple getting married are friends of the FH that we have both known since High School and they are very nice.

Should I suck it up and go? After reading this - seems like I should - but I'm looking to the brides for reasons not to attend - or a good kick in the a$$ to show me how stupid I am being. Thanks!!!