My girlfriend has never had much interest in me it’s been 2 years and she barely gives me any affection. What could she be thinking?

Anonymous
I’ve been dating my girlfriend for 2 years now and she still has very little interest in me most of the time. It was her idea to be a couple she asked after 3 dates and a month of talking and I agreed but she’s always kept me at arms length. I should mention she is nearly 30 and I am her first boyfriend but she’s very pretty and sweet not rude or anything I honestly think it’s just ignorance from lack of experience but I have only had 2 relationships now myself and I know that I need to hug her often and and hold her hand and sit next to her when we are at get togethers with family but she doesn’t do the same for me.
We are on a family vacation with her family that they were kind enough to invite me on and she has barely said a word to me the whole time (5 days) and doesn’t even sit next to me in the car half the time. She doesn’t walk with me as we see the sights she is with her sister or off by her self and doesn’t bother to invite me to go with her when she sees something she wants to look at. I have pretty much stopped trying to talk to her and being good company to her because she is not doing the same for me and I don’t know why I’m even on this trip anymore.

She’s not openly avoiding me it’s more subconscious I think.
ladies can you explain her behavior and total lack of interest in me why wouldn’t a girl want attention from her boyfriend and to give it in return and is there anything I can do to improve this situation?
My girlfriend has never had much interest in me it’s been 2 years and she barely gives me any affection. What could she be thinking?
3 Opinion