<human>: We have been officially dating for about 4 months now. We have a great relationship really, no issues except some stuff with sex and we can only see each other on weekends. It has been that way since we started dating. Due to work and distance. We are both very committed but I'm not feeling 100% about it. Essentially I'm getting feelings of wanting to be single again just because between work and the GF I feel like I never get time to relax. It's travel to her place, stay the weekend, get back Sunday, and go to work for the week. We have said "I love you" and I would say we are both invested deeply in many ways. 

She would feel blindsided I believe if I broke it off today. I'm worried I'm feeling this way just because of work stresses etc, but I don't want to keep saying "I love you" and acting like nothing is wrong when something obviously is. Our parents have already met briefly, everyone likes each other, I've met all her friends and she has met most of mine. We get along great etc.

Weird side note, she's beautiful but I'm not that interested in sex anymore for some reason, to the point where I tell her no sometimes more than yes. I know this will become an issue if it doesn't change. I know she has needs and I often don't want sex but still go through with it for her. It has become more of a chore.

Is it correct to break it off with someone if you're not 100% into the relationship even though everything seems right for the most part? I'm very 50/50 at this point on everything, the relationship, how much I want to see her, sex, etc.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Feelings of wanting to be single for no reasons other than my own. Need me time. Should I break up or see if I can ride out these feelings?