My ex is with another guy but i still love her and want her back.

Its been to 3 weeks since we broke up and she started dateing the guy a week after and only been together for about 2 weeks and said i was horrible and hes everything for her. Treats her well makes her feel good. We dated for 2 years and she has no trust in me now because i lied in the past about small things dealing with hiding best friend because she didnt like him and protecting other when they say "dont tell her i said this ill tell her myself" and wont say anything. She has no trust in me but i would never hurt her and cheat on her. i love her so much and i did so much for her. she says Everything is so perfect with him now and she says i didn't do boyfriend things like he does..like buy her things for no reason or make her dinner (which she doing today). i've bought her flowers and gift and took her plently of places. how  was i so horrible? this is the second time we broke up and she seems to look at all the negative. and says im so boring and dont take risks to break the rules  and my parents are so strict that she cant stand and im no fun like him. How do i get her back? i dont know what to do and i called after a week of no talking to see how shes doing and she didnt really care that we didnt talk that much or really miss me. she said she would never date me again becuz im so boring and no trust but i cant control my parents rules and i never lied about horrible things and would never do anything and shes knows that. But she still would like to be good friend just not talking every night. shes in the whole new relationship and everyone says shes in a new perfect boyfriend phase with this new guy and everything seems great... i dont know what to do next..i love her alot and i dont want to lose her, i hate feeling replaced with him calling her everynight and doing all these thigns with her and i want to prove to her i can make things better. i already apologized and told her how i feel. i hope things dont work with this new guy and i pray for her to come back..but i hate sitting around not doing anything and i feel helpless. he seems like a rebound and she did this before the first time we broke up found a new guy dated him for a month and said i was horrible but she came back after that. it feels like a whole repeat. but im afraid this is the end for her but she still means alot to me. Can anyone tell me what i should do next?