First, I don’t think this is how it works. Second, it’s a very ‘victim’ centric mindset. Third, stop thinking people you spoke about wouldn’t have managed life without you because they clearly have.
The fact that a person is choosing to leave also means that they don’t think of you and the relationship the way you do. Introspection maybe?
If this has happened to you multiple times, maybe you’re the one that can’t see signs and patterns. You’re waiting for every opportunity to play the nice guy and help someone feel better with an unsaid expectation of that relationship becoming more than what it is. Why?
Simple hai bro. Communicate at every step. Try asking directly or ask things which help you understand the state of mind and stability of the other person better. No point becoming Uday Chopra from Dhoom or in general either.
Feel bad because somehow you haven’t yet met the right person or set of people. But it’s also exciting to know there’s a ton of happiness waiting ahead for you. The wait and all bad stints maybe painful but so much worth the real love that’s coming your way!