Thanksgiving at his families or..

So I recently moved out of state so my entire family is in another state besides my parents and step brother.

My boyfriend and his family invited me to their thanksgiving feast (which is also the day of my birthday)

Should I feel guilty for going with him? My step dad will be out of town working on thanksgiving so my mom will be stuck with his family and she apparently doesn’t want to go with them but I feel like she should.. those are her in-laws.

And normally every year on my birthday since I was like 15 my mom and I have gotten into it. I got in trouble every year until I was an adult. I’m not sure why. But every birthday was SO BAD.

I really want to meet his family they seem really happy, positive and supportive. I want to be surrounded by happiness this year.

Side note: my mom wants to go with us to his families house and I just have a bad feelings about it.

I want the first time I meet his family to be just my son and I.