Major Advice Needed

sup doods i need some advice on what could be a life changing decision for me

see like ive been livin with this chick for a while right. i think shes cheatin on me. not like using the wtf r4 hax n shiz, but like shes bangin some other dood. sometimes the phone will ring and i pick it up and they hang up wtf. shes always goin out and says shes goin wit the girls and i ask what girls and shes like oh you dont know them theyre from work and im like wtf you dont even have a job. like sometimes she comes home in a taxi but it drops her off way down the street and she walks a few blocks home and she says its for exercize. an the other day i picked up her cell phone to see what time it was cuz i dont have a watch and she all started goin total pms on me and said to never touch her phone again n shiz..

well i dont wanna just come out and call her a fukcen crazy cheatin bitch or nothin cuz i could be wrong, but last night she was goin out again and i like crept outside and was hidin behind my car to see who was pickin her up cuz the drive ways like on a hill and i can see pretty much the whole street. and while i was crouched down behind my car i noticed there was some paint peelin off my bumper

so should i take it to a body shop or could i go to a local auto store and get some stuff to do it myself?