<human>: Can you condense the text into a few key points?

EDIT: with butterflies, i mean i feel realy nothing when we kiss. =(
So i've been with that cute lovely girl since 4-5 Months, and i just noticed that the relationship became wierd, i dont feel anything when we kiss and it's realy confusing, deep inside i know that i realy love this girl and shes always nice to me even if shes on her period, we had sex and 
everything and it was great but how could the feelings for her just go away?
i dont want to break up with her, i still think everyday about her but someday i dont want to met her like in the early relationship.
<bot>: = Had GF for 4 Months, after 3 Months i feel like my feelings for her are gone - but i still love her..and dont want to live without her