Trying not to be upset that my bf wants to go fishing the whole weekend instead of being with me? Guys help?

OK my bf is a BIG fisherman, something I totally support.
Well for the past year and a half we have been seeing each other mainly on weekends and once on a weeknight.
He has two friends that each want to go fishing one on Saturday and one on Sunday.
Im really bummed about it I dont know why and know I probably shouldn't take it personally but it sort of hurt my feelings but I kept it all to myself and told him to have a good time.
It would be different if we saw each other every day but we dont.
Guys how can I not be bummed about it and not take it personally?
Updates
+1 y
I guess what Im asking is do I have a right to be upset?
Trying not to be upset that my bf wants to go fishing the whole weekend instead of being with me? Guys help?
Post Opinion