My BF is Worrying Me

I wanted some insight from older women. My BF for the past couple months has been acting weird. He works all the time (normal) but doesn't make time for me (weird). I thought at first he had fallen out of love with me. He barely texts me and I usually initiate it. What is strange and made me do a double take is when I have seen him in public he is distant and keeps to himself with me and his close friends. He seems closed off. I found out he hasn't been talking to any of his friends or hanging out with his buddies. He blows up at me for little petty things and sometimes says hurtful things to me and his friends. He seems obsessed with working and nothing else. He works really close to his house so he just goes to work and goes home, that's his life rn. He isn't getting a lot of human interaction. He is acting strange. I've was friends with him years before we started dating. He was a really out going person who was loving and kind to everyone around him and he made time for his friends and me. I recently went through a lot of IUD issus and things like that and he'd normally be comforting me. I'm really worried that he's dealing with something and he's not getting any support or help. I tried asking him what's wrong and he says he doesn't want to talk about it. I'm used to being the person he leans on. I'm worrying about him, not as a girlfriend, but as a friend. Sorry this is long