My unexpectedly casual fling with Mrs. Right

I am (21m), and she is (19f). For context, I met this girl on Tinder a week prior, and this was our first time meeting. I pulled up to her house, and I grabbed the door of my passenger seat for her as we greeted each other. We proceeded to my friend’s place for a kickback. After a little bit of icebreakers and a couple drinks (she doesn’t drink), we sat down with my friends and played some games for a while. Slowly, the party died down, and my friend who owns the house headed to bed while she and I watched some random ass movie. At this point, I want to mention that she said she didn’t want to have sex on a first date, to which I replied, That’s completely fine. What was soon to ensue was the complete opposite of that. What started as me lying on her stomach soon turned into me putting my hand around her throat and kissing her lips. We ended up making out, and although I’m not the best kisser, I managed to keep up the heat and then trail off to kiss down her neck to her collar bone. From there, I continued the foreplay and soon got the okay to slide my fingers inside. After a bit of clitoral play and some added pressure from inside, she came. At this point, I was done, honestly. I respected what she said before, but then she hit me with “I want you inside me”! I was surprised but cautious still. I proceeded to ask her two more times just to make sure she was sure this was something she really wanted. She responded with a breathy “yes”. So I proceeded to pull out my cock, and I could see a surprised look on her face as she looked at it. At this point, this beautiful girl has me absolutely falling for her, and not just because of the situation I am currently in but because everything about her, from her personality to her looks, is so dorky and hot at the same time. I slid inside, and this was quite an experience because I’ve never felt such wetness before. Although I hadn’t gone all the way in, I could see her eyes roll back through a slit in between her eyelids. After about 30 minutes, she was worn out, and I hadn’t finished, although it felt amazing. She asked if there was something wrong, and I explained that it takes me a while to finish, and she was slightly upset that she couldn’t return the favor. I assured her that she felt great and that it was just me. I must have flicked a switch because she was ready to go again, and she decided to take control by getting on top. After another 20–30 minutes of hot breath and sweat, I finished inside her. This was a first-time experience for me, so I was just more attracted at this point. After a while of just kissing while she sat on top, we cleaned up and laid down for the night.
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A day later, after some texting about what we wanted in life and other things of that nature, we decided to hang out at my place and play board games with some music in the background. She also mentioned that she didn’t just want to have sex when she came over, and I agreed. After hanging out for a while and talking a little bit more about our past relationships, We realized that we were very similar. I felt like we were connecting way more than we already had the previous night. After we ate, we crawled into bed. Once again, we started to make out, and I continued to please her with foreplay. After that, she once again asked for it, and when she did, I immediately made her confirm rather than jump on the opportunity. She replied, “Give me that dick”. I could tell this was more aggressive than last time, so I told her to turn and bend over. She did it immediately after I commanded it, with no fuss. It was almost like she knew that I love when women are submissive. We went at it for 30 minutes, and she told me she was tired and couldn’t take it any longer. I kissed her forehead and said that it was fine and that I appreciated her effort. We laid down for about an hour, and she started to grind on me. It only took me a couple seconds to get back up to full size, and she immediately Put it back in and pushed back against me as I stroked deep. Soon after, I was filling her up. This was just an amazing feeling. We cleaned up, and in the morning she went to work.
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We texted through the following day, and her responses started to change. I noticed something was wrong, and I asked her, but she just said it was nothing. Obviously, this meant that it was something. I just didn’t want to pry and ruin our relationship. Soon after, I was faced with a response to my question, “Do you still want to hang out?” Her response was “Idk.” I was so hurt that I blocked her and began writing the perfect message to convey my feelings to her. Although I was putting my pride at risk, I had felt that I loved this woman more than my previous 3-year relationship. We had shared that we wanted kids together and to get married. It all just stopped so suddenly, and I needed to explain myself even if she didn’t care because it was for me, honestly. I sent her that message two days later.