I have been engaged since d past 3mnths bt recently when me n my partner were getting intimate she told me about her previous relationships n d physical n sexual encounters she has had wid her ex.now i feel that i cannot match her expectations and keep her happy because apparently her ex was very good and they a had a long relationship.this makes me feel very uncomfortable but i dont want to let her go because i love her a lot.i feel very frustrated and angry when i think about her past pls help