I admit it that I'm not good at dealing with loneliness for long periods of time either. But I will not hang onto "dead weight" as they say just to not be alone. That can do more harm to you. I'm not saying someone's friends should be your punching bag and just to complain all the time, but if they tell me what's their issues and I listen to them, then I just expect that in return.
I had a former friend say they got tired of hearing me complain, but I never once complained about her complaining about stuff, so I ended it and I'm better off. She must not have liked it that I spoke up to her, too bad I say!