I thought it was good until it wasn’t

Hello, So I’ve been with my boyfriend for almost 5 months and it’s been mostly good but the bad times really get bad. It seems like he really doesn’t understand when I’m upset that he needs to be there for me and care for me when I can’t do it myself. I don’t depend on him to always be there for me but when I really need him he’s not there. I don’t think he does it on purpose, I just don’t think he’s able to take care of me emotionally the way i need him too. I’ve just been so stressed with work and finding my future that when I want to go and unwind to talk to him he just doesn’t seem to care, ion know.