Whichever her reasons may be, one thing for sure is,
The relationship is boring!
Ila sababu zinaweza kuwa;
a) Kakuchoka tu, "what u have offer is not enough for what she needs in a boyfriend"(kama wewe ni boyfriend version 1.0 anahitaji boyfriend version 2.0 or higher)
b) Kachoka style yenu ya mambo ya sasa
c) She is lurking upon a potential relationship but she is not confident in him so she can't let u go YET.
d) She might be going through some stuff na akili yote iko huko kiasi kwamba umuhimu wa uhusiano kwake umepungua.
Whatever the reason is, it'll leave you with two options;
1) Kama unampenda sana sana na unadhani she is the one. Basi kuwa naye karibu sana na umchunguze u might find out the reason, uwe tayari kumsaidia arudi kwenye uhusiano ama ku let go if things go wrong.
2) Kama ni mpitaji just get the hell out, u don't want to go down that road dude!