My bf keeps in communication and interacts with a girl he met online

Would you be upset if your boyfriend commented heart eyes on a girls photo a few days after sending you this text?

My bf keeps in contact with this girl online she’s into basketball which is his favorite sport, I know nothing about basketball it’s not something I can bond with him on but I was looking at their interactions and he is constantly thirsting under her photos,inserting himself on her posts and it’s bothering me. I have mentioned to him before that I feel like he wants someone who’s into sports and he has reassured me that he loves me because I care about him and that’s something he’s never had.