sister in laws don't like me 😫

Me and my sister in laws are close but we're not like close friends. We hang out and we're getting to know each other. Sometimes I feel like I have to try hard to fit in with them, I'm kind of shy, while they're outgoing. Well last night we all went out for the night had fun and woke up this morning a little hung over. One of his sisters invited me to this Super Bowl fair downtown, it has drinks and food and you can watch the game. I said yes and they said they'd call me. Well I get home and they never called. I just assumed they were tired from last night. So I asked my husband if he wanted to go and we went. Well we noticed that they were there. I guess they decided they didn't want me to go? Not sure. My husband was mad and told me they're assholes don't worry about it. I'm more insecure now, and I just feel really upset. Am I overreacting ? I just feel bad about myself in a way, like somewhat embarrassed. Should I say anything to them or just let it go. I almost just don't even want to talk to them anymore or hang out with them.