Catching feelings?

At beginning of March my boyfriend of 3 years broke up with me out of the blue (the day he got back from a trip to Brazil). We had been looking as houses to buy two weeks prior and I felt blindsided. After having to move in with my parents and going into lockdown it's safe to say I was forced to confront a lot of demons on my own with no distractions. Fast forward 4 months, having drinks with some girlfriends, they decided it was time for me to get back on the horse and created a Hinge profile for me. That's when I saw him. He was edgy and had this mysterious look about him, I wanted to know more. We matched but very quickly the next day, the influx of messages on the app sent me into a panic and I realised I wasn't ready for the dating scene. We'd already followed each other on Instagram and the conversation kept flowing. I felt more at ease knowing I had deleted Hinge and only had one person to reply back to. He asked about my situation and understood I wasn't ready so we carried on messaging just as friends. Ove the course of a month the chats got flirtier and flirtier and the chemistry between us was undeniable. We agreed to go on a date and being the first, first date I'd had in over three years, I'd say it went pretty well. We laughed, drank, spoke about our passions for travelling and broke all social distancing rules. We went back to his and I couldn't help myself, we slept together. It was the best first date I'd had in so long. After a week of messaging and failed attempts at planning a second date, he said he couldn't carry on, lots of things on his mind and wanted us to stop before it got even more intense. I was confused, disappointed and hurt that the first person I'd really opened up to since the break up had rejected me. I respected him for not completely ghosting me which is usual this day in age but I left it. He then deleted his Instagram for me to never to hear from him again... 

3 months later he popped up, liking my posts on Instagram and replying to stories. He was back and the flirty messages continued. I decided I would use my new found confidence and ask for what I wanted. The sex was great, he was comfortable, why couldn't we do fun and no strings? I definitely wasn't ready for a relationship and the idea of a casual fling with him was a perfect scenario. A few weeks and naughty pictures later and we'd set a date, I'd come round to his and we'd start ticking things off our "sex bucket list". It was like a movie, I'm talking sex on the couch, carry me to the bedroom type stuff. It was fun, surprising, exciting but comfortable at the same time. Afterwards we talked like old friends and watched a movie and I left, not breaking my "no sleepover rule". Like deja vu, not even a week later, the dreaded paragraph landed in my DMs. "I thought I could do no strings and just fun but I can't, The sex is amazing but it isn't sitting well with me and I have a lot on my mind." Like before, he wasn't giving anything away, no real reasons. Refusing to let me into his head. I still don't know what happened and I doubt I ever will. It could have been so much, but was never given the chance. It was always be the fling that never was. Did he catch feelings? Did I?