The full story is pretty long, but I'll try to explain it briefly. I started dating a girl in August. After about a month of consistent dating, we had one of those serious dinners where you talk about the relationship and where it's going, how serious it is, expectations, etc. It was clear to both of us we had potential and that something was there, so one month was an appropriate time period. Well, turned out she did not believe in monogamy, never wanted to get married or have kids, and definitely did not want to be exclusive. It was a lot to take in that night, but after thinking about it for about a week, I decided to keep seeing her anyway but to not get too involved.
We kept seeing each other through December, and things were going mostly well. It was kind of strange for me because even though we seemed to get along really well, we never really made a point to communicate daily, and she actually made it clear she didn't want to communicate daily, so I didn't force it. We hung out casually but had a deeper connection at the same time.
During the holiday season we both kind of went our separate ways to spend time with friends and families, and we didn't talk for about 3 weeks. Then when the holidays were over and we started hanging out again, she started really turning things up as far as wanting to hang out a lot. I was dealing with some pretty serious family issues around the same time, so it was all emotionally overwhelming for me, especially because I really liked the girl but didn't want to get attached since I knew it wasn't going anywhere.
We talked again in February about our relationship and where we stood, and she told me she actually really liked me and wanted us to spend more time together, but at the same time she didn't want the label of a relationship. I agreed at the time, but then I went on vacation to Mexico for two weeks with some friends, and while there, I slowly over the course of the two weeks decided I really didn't want to continue things with this girl at all. Part of me loved her, but it just seemed like she wasn't really there for me even though she did care about me. There was this sort of push-pull element that was emotionally exhausting for me, and I also felt like she had really been trying to change me over the previous two months. I intended to "break up" with her over dinner when I came back, but I just really didn't feel like seeing her at all, and then things got really busy in my life for about a month, and then so much time had passed that it felt really awkward. We weren't "in a relationship" together by her own admission, but we dated regularly for six months and had many long, personal, in-depth conversations, and I just went away on vacation and then never talked to her again.
It's been 3 months now since we had any communication. What are your thoughts on all of this? What course of action (if any) do you think I should take? How big of an Ahole am I?