Is IT ME or HER - IS this NORMAL ?

Well first off I am new to this so please bear with me : I am currently engaged to my fiancee which is of 21yrs old, I am 26 yrs old, we have been dating for 3 yrs and more. First, since we have started, I was the typical guy with friends,career and sort enjoying life but then as time goes on she hated it she is more of a home person nothing but just school and thinks and says she can get anyone you can say I was a first,so over the course of the relationship, I changed for the better with her, stopped with the guys, friends, career, church and certain stuff to make her happy but lately she have been so negative about the relationship. It seems I am always wrong and she is always correct so at first she was controlling distancing me from family, friends and certain things saying i have to show her i am a man for the future so I did, but then I fell back into that groove of talking back with people and family which was came bad becasue i was the bad guy with everyone but she was happy but then i went back missing that in which she flipped and i broke trust and etc. I am trying to make her happy but it seems i am always the wrong one, yes i broke those certain things with her trust(texting friend,family or wearing earring, or basically she always bringin up certain things) but then get caught I am a liar. But I don't know, i changed she currently doesn't work she just go to school full time so I spend my day spending time with her waiting until she gets out of school all the time with her. Everything she stated that she hated i changed or try to improve but always putting me down and the relationship. Well if you must know, everyday i spend my day with her, i don't work because she is paranoid might do something wrong or don't give her the needed attention and have alien ted myself ,it have been a struggle but want to know your take on it, ask questions if i need to clarify something, I want to quiet but then I am holding becasuse manily she would change or its me. .