Life has been hard

I'm struggling pretty bad. I have some chronic illnesses that have nearly killed me many times. My best friend died from the same illnesses several years back. I feel so isolated. My current best friend has been suffering from PPD for the last few months. We hardly ever talk anymore and I know she's going through her own stuff so I try to be supportive. My boyfriend and I are long distance as it is but especially now that he's in the military. I'm already in therapy, but no matter how much I work on myself and make changes in my life I can't help but cry almost every single night. My life was already hard, but now I feel like I'm going through it all alone and that's not something I ever anticipated. I miss my friend that died so badly, I'd give anything to be able to talk to her about this. I just don't feel like i have anyone to talk to, and my therapy sessions don't feel like enough, waiting for them and then not feeling like there's enough time to get into much. I try not to complain, but I'm pretty unhappy with how my life is and I don't have anyone to vent to... I don't know what to do.