I (19M) have been with my girlfriend for just over a year and I love her a lot. We've had ups and downs, including a two-month break, but we worked through it and came out closer.
We've never had sex (we tried once and it didn't happen), but for most of the relationship we had a healthy level of physical intimacy: kissing, touching, etc. She was pressured into sex by an ex when she was 15 and wasn't ready for it, and she says she hasn't had sex since. Whenever things go further than a certain point, she shuts it down, and I've always respected that without pressure or complaint.
The change is that over the past month we haven't made out once, and we barely hug or cuddle. A few nights ago I brought it up. She agreed she can't remember the last time we kissed and said she "doesn't feel the need" for it. When I asked if she's still physically attracted to me, she said nothing has changed, she just doesn't feel the need.
I've never pressured her and I never will. But the longer this goes on, the more disappointed and drained I feel around her. My mind has started to wander, though I would never cheat.
We go to university in the same city and I stay at her place most nights, so we're together constantly.