Should I, a 22-year-old woman, get in touch with him, a 30-year-old man?

Hello Reddit, I'm in a tough spot and could really use your advice or insights. Here’s what’s going on: I recently ended a relationship with my ex that lasted a few months, and it progressed quite quickly. I was okay with that because it felt like we had a deep connection, as if we had known each other for years. There’s an 8-year age difference (I'm in my 20s and he’s in his early 30s), and after finishing college last year, things began to complicate. He has a dismissive avoidant attachment style, which I didn't fully grasp at the time, but can now recognize in hindsight. He had just relocated to NYC for a new job in sales, which came with demanding hours, and he was feeling very overwhelmed. Eventually, he quit his job and, on the same day, abruptly ended our relationship, citing the distance and our different life stages as reasons. He said he needed to focus on finding another job and felt we weren't compatible. This came as a shock because we had even discussed moving in together, and I was considering relocating to NYC. After about five months of no contact, I reached out one night to see how he was doing (I admit, I was a bit tipsy and missing him). He responded enthusiastically, but then suddenly went silent again. Fast forward to a week ago—he reached out to ask about my life and grad school, seemed genuinely interested, but then, once more, stopped replying. Now, I'm really missing him. I believed he was "the one" for me, and the whole situation feels unresolved. I'm caught in a dilemma—should I reach out to express my feelings, or is it best to let go and move on? I'm feeling lost and unsure about my next steps. Any advice, perspectives, or sage words would mean a lot. Thanks for taking the time to read!