update: She messaged me saying "don't beat yourself up, it's life **** happens, just didn't work out" and also she told me that in the begining when i was taking her to the nice restaraunts, giving her gifts freaked her out. She said "you don't even know me but were showering me with all those nice things for no reason". She said you did it so well, that i had a thought it might worked out , thus gave you a chance , but it just didn't happen during such long time.
That's rough to hear, but i mean i was raised that way that i should take a good care of woman i'm dating. Thus, it's pretty much normal to me. In the end damn it, seems like deep down i don't know even how to treat woman in a right way to get them into romantic relationships.
Totally agree with @BlackInGame, that it was all my fault and low competience on what to do with women.