Okay I'm new to the dating scene and this following scenario has left me feeling awful:
I started talking to this girl from OKCupid, we texted for about a week and a half, then went on one date with her. The date was fine, though there were a couple times where I was woefully uninterested in anything she had to say. Anyway, before and after the date she was super flirty during texts, sending me pics and being intensely sexual, and being a dumb shit lead by his dick I obliged instead of telling her to cool it off.
I should mention that she is quite overweight and I don't find her particularly attractive, but being a virgin and tits being tits I found myself participating almost against my will.
Here's the problem, I'm continuing to date other people from OKCupid, and I've always been very honest about this. However, I believe she misinterpreted my returned flirting (and pics, as embarrassing as that is), and probably rightly so, as me becoming attached exclusively to her.
So on Sunday she asks what I'm doing for the night and continuing my honest approach I tell her I'm going on another date. Her reaction is odd, but difficult to read. She says it's cool but I detected a hint of anger/jealousy.
This other date is nearly flawless, and we clearly have great chemistry with each other. Not to mention I actually find her attractive...
So I get home and immediately girl #1 starts acting more sexual than ever, almost in an attempt to inform me of what I'm missing, so to speak. Again being an inexperienced moron I play along, but afterward feel unbelievably guilty.
The next day, I told her that we need to slow things down, and that things have started to feel weird. She was clearly hurt by this, as she very obviously thought we were much closer than I actually felt, and this is what's chewing me up inside. I never gave her a hint that I wasn't feeling what she was feeling, and in order to not embarrass her, I always went along with with her... giving her compliments and basically giving off signals that I was totally into her.
TL

R - I strung girl 1 around because I'm a pussy, met a more attractive/compatible girl, and devastated girl 1 with my sudden "change of heart".