broken heart

I feel so alone. My last pregnancy he cheated on me most of the time, he finally convinced me this pregnancy will be different. Again he is 100% checked out emotionally. I can't help but feel like it's happening all over again! His friend is getting married this weekend and he is a groomsman. He literally told me he does not want me to come because he wants to have fun, without feeling guilty. Why else wouldn't he want me there then to cheat on me? He will be gone all weekend. I told him this hurt my feelings and his response was " I never thought you would be ok with it" so in other words, he doesn't care. I'm growing very angry, hurt and bitter. I feel more alone than ever