What would you do

Im just coming on here for peace of mind because I know I can be a bit much sometimes. My boyfriend turns 21 soon and he’s spending the whole day at the casino with his family which I’m 19 so I cannot do that obviously. We have been together for a while like 3-4 years a while. Is it valid I feel like he should want to spend his day with me somewhat or do you think I need to let loose a bit.i haven’t said anything to him recently I did a year ago and she was set on seeing his family which I get but we’ve always spent big occasions together so idk. Be honest