The Wedding - Jason & Tracy

This is my cousin Jason, he is my Mother's Youngest sister's oldest son. Him and I grew up together and we were more like brother and sister than like cousins. Yesterday, September 4th, Jason got married. I was conflicted by this wedding on whether or not to even go. I wanted to go, but then didn't want to go. See Jason's now wife, Tracy, and I used to be close also and something that I'm not even too sure on happened and she turned on me. Turned on me by telling everyone who asked why I wasn't at their parties that she wished I was dead and could F off. Yes, she said it numerous times. Hearing a rumor from one person you go hmmm and question it, but hearing the same thing from five different people who each hadn't known I talked to the other well now that is believable. I never knew what this was all about and when I questioned what is all this mess about Tracy ran and told my cousin that I attacked her in front of her family on her Facebook wall... ahhh no I sent her a private email and asked her. This was not an isolated incident, she has done this to others around Jason as well. But this put a wedge between me and my cousin for the last few years, a cousin I was so close to. So the day he told me he got engaged I didn't act happy or surprised, I just didn't know what to say. What do you say?