I dont think I can be a good friend to anyone 
me neither. Not sure what your reasons are, but I am a selfish motherfucker, on top of that introverted.
There was this show on the History Channel, I believe it was called Tales of the Gun. In the episode on the AK-47 one of the people interviewed talked about how GIs loved the gun because they could let it rust up in a locker, take it out, kick it around a bit and it'd be fine to shoot.
Anyway, there are people who like having friends like this. You touch base once in awhile, you don't do emotional bonding bullshit, just kick the bolt on the AK-47 that is your friendship and pop off. It's the majority of my friendships atm because I'm not really cut out for anything else.
If I were a success win Instagram business guy I'd say something banal like, "Limitations are opportunities," now but I mediated interpersonal relationships through an edutainment program on a dubious cable network.