<human>: Give me the gist of the text in a nutshell

We've been dating for 2.5, known each other for 3. When we met, I was always a bigger guy, having been an athlete and dedicated to health, but I always carried a little weight as well (you can see the outline of my abdominals faintly). She tells me she doesn't like skinny guys, but doesn't like overly muscular bodies either. 

I have had this stupid "four year plan" since where I go on cuts in the summer and maintain my macro nutrients the rest of the year to have energy to focus on school. With two years down, I have lost 22lbs from where I started and my strength and conditioning has definitely gone up.

Recently, she has been commenting that I should make my arms bigger, but also sometimes that I should lose more weight. Honestly, it does make me self conscious sometimes when she does say that, and I have told her so. She recently has joined the Greek life, and I feel like she may be comparing me to other guys she has seen.

Ironically enough, my girlfriend is almost the opposite to me when it comes to health. If I am eating chicken and rice for lunch, she'll most likely will be eating mac and cheese. She has a bit of fat on her as well, but is definitely not overweight and I love her body. I never bring up her eating habits, but the few times I have, has been because she comments on feeling sick and I will mention eating better food that is nutritious. 

This is more of a rant but, it bothers me that my GF comments on my body, to get bigger but lose weight (very, very hard to do at the same time), what does Relationships think?
<bot>: GF goes back and forth telling me to get bigger arms and lose weight. Makes me self conscious, but she will say it despite the fact I have told her.