thank you for having me and trying to help.

When we first started dating we couldn't keep our hands off of each other. It was very passionate.
Being a typical man, I was overjoyed because of this.
It was like this for maybe one year. We never fought or had disagreements at this point. As time went on our sex life dwindled, we had the odd argument here and there. We have a lot of common interests and did a lot of activities together. She had started a new career back then and was very stressed with work. She had a couple surgeries on her ankle and a lot of the things we used to do together were no longer possible and some of these things I still do by myself so that I can keep active and healthy and I think perhaps she holds this against me because Things were good for a while after but I think after her second surgery things seemed to change with her. She was a pretty active person before her surgeries and I think part of it was she lost her stress relief abilities with those surgeries. She used to be more positive and optimistic but now she's generally negative and pessimistic. I tried suggesting new activities that wouldn't be affected by her ankle but she can't seem to get over not being able to do the things she once loved doing and wants no part of anything else.
I've told her this many times that we were happiest back when we had an active sex life but she's never in the mood anymore. I'm not saying this is all her as I know I'm not doing enough to try and get her in the mood emotionally. I'm not a very emotional person and have a hard time expressing myself. I think maybe I just got complacent and accepted things the way they were.
We work opposite shifts so we don't usually see much of each other 2-4 days a week. We get along for the most part but lately we seem to be having similar arguments every week. I think part of it is we are both too stubborn to change our ways.
She is an excessive worrier about many things and I don't worry about things unless I think it's important so we will often disagree about things because of that. I've tried telling her we don't need to agree on everything and she thinks I'm just trying to do the opposite of what she wants. I will often disagree with my friends intentionally just because that's how the dynamic of our friendships work so I think she feels I'm doing the same to her because I don't necessarily agree with her.
I'm like any other man, if I'm getting sex regularly life is good, so I'm really hoping part of this attraction is because I'm not getting any action at home but I fear it might be more than that, I honestly don't know what these feelings are