Why do i feel like my gf and i are drifting away?

i talked about it with her and she said that she has been feeling the same way lately,she seemed pretty sad,i told her that i would never leave her because i love her with all my heart and soul and that i really dont want to ever lose her im so deeply in love with her,shes my everything.she said she loves me to and that she will never give up on me no matter what,she loves me more than i know,i love her so much much guys we both dont want to feel this way,she told me she doesnt like to feel that way,she doenst wnat to lose me,i love her so much can someone help me out,i dont want to feel like im drifting away from her :/