<human>: We have been together now for over three years, and things have of course been rocky at times and the past - as well as totally amazing! 

However, recently I feel as though she hasn't been as interested as before: Not texting as much, less sex, we don't go out as much anymore. 

Texting has been infrequent and rarely of much substance, it has been really frustrating trying to draw conversation from her - although she says its down to her not wanting to distract me from the heavy workload I've had 

Sex has never been particularly frequent, but now she refuses to be intimate when others are in her apartment (flat sharing, there is just about always people around, coming or going or whatever) - which I totally understand, it's just weird to have her change her mind after three years of ninjaness. 

We have stopped doing anything outside of the apartment (she's saving for a holiday with her friends, so I understand), because it's quite expensive at the moment. I mean, we spend most nights on netflix just lying watching movies or making smoothies - which again, is great and I totally enjoy, but it literally never leads to sex or petting, just movie watching or nice smoothies. 

The previous issues might be seemingly insignificant, but something was definitely off. I spoke to her about it and she confirmed my fears :C She said the relationship is starting to feel platonic. 

I must admit I've changed a lot as a person recently. I used to exercise every day, practice martial arts, have more free time, play guitar, do music, all these great attractive qualities that I've just lost. Maybe through laziness. 

The question may be very broad and indecisive, but I'm just feeling really worried and confused, and want to know if anyone here can give me any advice or help me rekindle the romance that I've lost in the relationship. Maybe something that worked for you? 

Please help :(

Can you summarize the given text in a few sentences?
<bot>: Relationship losing it's flame, I desperately want to fix things but don't know how. Does anyone have any personal experience or insight that could help me?