Is he serious about me?

My bf (of a year and a half) says he loves me and wants to spend the rest of his life with me but I feel like he avoids my family and doesn’t really want to be close with them.

My brother’s gf is begging to meet us and is super eager about having a family BBQ and my bf keeps making excuses not to come to them. He comes over my house all the time but I feel like he doesn’t really want that close bond with my family. I’m not super super close with them,… but I do want to have a nice relationship with them and have fun with them OCCASIONALLY. Not 24/7. It just seems like he wants to take me away and that’s it…..

Anything for his family i’d be there in a heartbeat….