Well, now, I'm all confused. You start off saying you have four friends. Then you describe three people who clearly aren't friends. Why did you include them in the "I have four friends" claim? Were they ever friends?

You've said the 3rd one makes you feel guilty. I'm guessing the first 2 do too. & it's guilt that keeps you enslaved to them.

If you can't just tell them that you have nothing in common, there's no give-&-take, I'm moving on to look for other relationships (& that's hard), then ease out gently. No gas, other commitments, & maybe a bit of the truth whenever you can handle that. But you cant continue to sacrifice your life to people who bring no joy to yours.

You know none of these three would, if the situation were reversed.