so i'm now engaged to a girl , 20 years of age, i originally took her virginity about 6 years ago. we went out for about 6 months and broke up due due to interist in another guy. since then in the last 5 years we've have always reconected off and on.... ( usually booty calls from the both of us).... but never officially got back together because she liked to smoke pot and i very strongly oppose that. but we reconected about a year ago because she stopped smoking and we got back together. we are now engaged and have been for about 3 weeks.
when we got back together her sex drive was amazing for a woman ( buying sexy lingire for me as surprises, ect) we'de have sex usually about twice a week. but in the last 2 months or so ( maybe a little longer) her sex drive has dropped rediculously. we might have sex once every 2 weeks maybe. and theres no sexy lingire or anything of that sort. at all anymore. she's mentioned that shes sorry and she doesnt understand why its dropped so much, and that it's been like this with other relationships that were longer ones. she used to always make sexual comments and whisper provocative things in my ear and we just had an amazing sex life for quite a while. and then it just dropped like a rock all of a sudden. i cant help but wonder if i'm just a horrible lover, or if it is just her. shes not on any type of birth control or any other kind of medication, and i just dont know what to make of it. can you help me out at all?? any tips ? pointers ? suggestions?