My girlfriend seems uncomfortable with me seeing her naked, among other things.

Honest guy it is time to talk about this with her! Whatever the problem is it will only get worse if it isn't dealt with. No benefit comes out of not communicating. It is the key to having a strong relationship and a healthy sex life.

 

Its ok..give her some time..even my gal was like this..Some girls are very shy to show off their assets..Your girl might be one of them..So bro.!! give her some time.!!

 

the worst possibility is she has another guy.
i had ever been in that situation. maybe it is not the same but i see some similiarities.
i asked my ex to have sex but she was refusing me. i forced her a little by telling i was so horny and couldnt stand it anymore. she said ok but she just gave me a blowjob. i cum in her mouth and she spitted out. she never did that. she always drink my cum. i was thinking maybe she wasnt in her mood.
but a few days later suddenly she told me that she went to other guy and wanna broke up with me.
a couple month later i heard that her had married with that guy.
that is my experience.
let's hope the worst possibility wont happen in your relationship.

 

BINGO! Women are not made of sugar and spice and everything nice and it's not always something innocent that explains odd behavior with them, some of them hope you think that they are so they can get away with sneaky shit.

It could be the weight gain thing but honestly if you guys have been fucking and showering together that long, I seriously doubt it. She asked the OP to leave the room cuz it made her uncomfortable??? That smells like a cheater is hiding something. Also the fact that she jacked the guy off out of the blue but would not let him reciprocate??? She was satisfying your urges without you checking out her vajayjay. Sorry but this shit stinks to me.

 

She and I went on vacation together. Things still aren't back to normal, though. We went for vacation six days. We didn't have sex on our trip, but we were staying at her aunt's house, so it would have been a little awkward. Plus, her aunt explicitly told us no sex in the house. That was her aunt's only rule while we were at her house: no sex. She kisses me different now, too. There's less passion in her kisses. I haven’t asked her yet because I didn't want to do something that could ruin our vacation and after our vacation she got a bad cold so I haven't wanted to bring it up while she's sick. The last time I tried to get intimate with her, she moved my hand away; and the time before that, the same thing; and before that, the same thing. However, she still likes talking about our sex life with me, about what we have done, about what she wants us to try. Just today she was telling me how she wants me to buy large condoms because they work better. I bought a lot of average sized condoms because they were on sale but they sadly do not fit properly.