8 year relationship (age 14-22)

I was in an 8 year realtionship from age 14-22,suddenly she cheated for 15 days, replaced me with the new guy n denies repair

she broke no contact 10 times,i beg for repair, she denies repair, she cried for first 50 days, today is day 115, now i cant even strt a no contact, she tells she has no prblms with me,i m perfect as a bf,her new guy had proposed her 4 times in 9 years, she had rejected him every time, this time she did this,in 9 years they both ve nt even talked