Am I being replaced?

I feel like I'm being replaced. My boyfriend and I have been living together over a year now. He started his new job in January and met some people there. He told them to enroll to the same gym chain we started going together since September so he started going with them instead of going with me, leaving me alone. He also started going to the sames places and do the same activities we used to do together and spends less and less time with me. I work at home so I do all the chores by myslef. He doesn't do much, and when it's his day to cook, he decides he's going to hang out with them. I want to be clear that I'm happy he's making friends and I've never asked him to include me in their activities because I respect his space. However it bothers me he left me aside specially at the gym, he knows I struggle going becuase I've been feeling very depressed lately so I don't have much motivation. Knowing that he still prefers going with them (he promised me we still go together) and he doesn't provide me emotional support since he thinks I don't reasons to be depressed about so I don't deserve support because I sabotage myself. I don't know how to feel about it, I don't know if it is okay to feel sad about this or I am overracting (as he says)