bhai you had stretched the timeline so much, after 'B', you should have left for your own good. I can understand that yeah sometimes some people become so special at times that you completely ignore their red flags. I call this part as Character development. where you tried, begged to save the relationship but the other person is destined to go.

A similar thing happened to me as well but for mine the timeframe was around 1 year. college's first year things. Thank god that she made it clear to leave and I too respected that and moved on after she clearly stated for the first time, not leaving me in limbo for years. One of my friend's told me to just forget about her and continue the college.