Weddingbee boards

So a little over 2 yrs ago my cousin and i were very close. We had a huge fight. I found out she was lying about something (business mixed with family). I was helping her find a home to buy and she told she wanted to take a break from looking and then went and purchased through someone else. That is fine. I just wish she would have been honest instead of telling me after the fact. So anyway, we stopped talking for like 9 months. We grew up really close.

Finally I called her and asked to have coffee (not sure she would have made the first move). She stood by her decision with no really good reason and although I think she was wrong I let it be. Since then we haven't really been very close anymore. We used to go to movies together, plan to watch out fav shows together, dinner, beach, shopping, whatever. She goes out with other friends and never invites me although I have invited her out with mine. We were supposed to have dinner last weekend and I calledf and she never called me back and I found out later she ditched me to go swimming at someone elses house and never even called me to let me know. I had to text her the next day to see what happened.

I got engaged 2 months after her BF of 5 yrs broke up with her. She hasn't seemed genuinely happy that I am getting married. It took her weeks before she came by to see me and take a look at my ring. I have decided not to include her in the wedding party but am feeling really guilty. I don't want to hurt her feelings or offend her but I just don't feel as close to her anymore. I am ready to officially ask my bridesmaids now to be in the wedding .. how do I get over those guilty feelings?