Sayin tattos

I’ve been in a relation with my ex for almost 3 years im 26(M) and shes now 28(F) with a 7 years kid from her first relation. We broke up on bad terms, like on the last 2/3 months the relation was almost dying i didnt gived her the attencion she need it She started dating a guy from her work a 18 years guy 2 months after our break up…they been togheter for 5 or 6 months and even in the relation with that guy we were talking like to make another try etc She broke with the guy and was with me 2 weeks and she said she doesnt have feelings for me anymore and she returned to that kid again. They broke up 2 months later and called me sayin she missed me and my voice. We agreed to take things slowly and we been getting close for about 3 months. I changed a lot after the relationship( we broke up one year ago), i started doing gym, i bought a new car, i covered my arm and leg with tattos witch was something i always wanted and and and she saw that and she was really happy about my change. Everything was great on those 3 months i gived her all the attencion she need it everything that was missing and we agreed to “lets make it right this time” and she said she feel sorry for what she did and now she still has feelings for me ahahaah now? but when it cames to getting closure to have sex she doesnt want it cause it remember her the last 2 months when the relation was dying and when we only had sex like twice a week and she cant go over it, so why you still want something then? She was cold from a day to other and said that cant do this anymore and “its not like the beggining” and now i descovered she returned to that guy again like wtf? 3 months i was giving her all the attention taking her out more frequently giving everything from me and when i told her one day if she still likes the other dude she said no “if you know me im in a relation until i dont feel anything” and saying sorry for that and now she returned again?? How can someone say stuff like i still have feelings for you saying sorry and lets make it right this time and when i try to do it right she still returned again to that kid wtf? I mean i almost expecting that idk why because maybe they work togheter and she can stay single She blocked me on everything and when i asked why she said why u acting like nothing happened between us? I mean how the fuck you wanted me to act? Wasnt supposed to leave the past and try another page? Whats your guys opinion on this