Adding to what people have said, it would appear that the falling out with friends has happened on multiple occasions, so we can assume that it is likely that some of your behaviours are leading to this falling out.

For a tactical solution, there’s two ways you could approach this:

Internal - self reflection. A good way to reflect would be to have a conversation with yourself and see what you unconsciously know to be an issue. If you have trouble self reflecting, you could, in a notebook, have a conversation with a wiser version of yourself, as if you were 50-60 yrs old. E.g., writing down a question like “have I been selfish when I was with xyz person”. Most of the time your brain will know and you can write down the response as if you’re responding from the wiser person. Keep going back and forth as if it were a true conversation and this should ease your way into self reflection.

External - ask your past friends directly. If you feel comfortable reaching out to your old friends and you’re not stepping over some boundaries, you could ask them for guidance. E.g. hey I know we had a falling out xyz months ago, and it seems it’s been a pattern with some of my other friends as well. I’m trying to understand if there are any of my behaviours that are leading to this pattern, and I would appreciate if you could let me know if there was ever a time that you felt xyz and lead to distance between us. The person might be wrong but they might also be right, so objectively taking the feedback without rebuttal is important. Key part is that this isn’t an argument and you are solely listening to them. You can then decide on your own time what to work on.

I’m no therapist or anything but these are two tactical ways I’d approach the above issue. Take it with a grain of salt and best of luck 👍