Can focusing on career lead to complete avoidance?

I recently dated this guy, 7 years younger than me. At first I was iffy about the age difference, but our instant connection made me feel otherwise. Everything was perfect. Great conversations & always had fun in each other presence. He even treated me like a queen, a pure & utter gentleman to me. I was so impressed…
Him being a union firefighter on top of a construction worker, his career suddenly demanded him to take on a handful of courses, both osha & emt training, and maybe a few more. I understood his need to focus and that he said he wouldn’t be able to give me the time I deserved. But it felt like an abrupt rug pull. Just days before he was promising me he would never hurt me, I wouldn’t have to face hard times alone etc (my father currently has months left within his cancer journey). I’ve been so guarded with myself and haven’t let anyone in, but him, he made me feel so safe. Which was a big leap for me. When he told me he had to pull away I was distraught completely, I cried a lot. But ultimately understood, but yet I wanted him to know that I would genuinely be interested in waiting for him..
Next time I ran into him on Valentine’s Day it was like he was completely avoiding me, which took me back even more. I talked to him bc I didn’t see why we still couldn’t be friends. He kept reiterating how busy he was and how this process could take 6months to a year.. he invited me to hang with his friends but even then he kept physically distancing himself from me.
I don’t understand what the needs for such distancing or avoidance. Is this normal? It’s hurt me a lot as I opened up so much to him, vulnerability is hard for me, and the reassurance he gave me felt so real. I decided to stop contact with him, after I cried to him on valentines night. He said he would text me eventually, wiped my tears, and that he was done speaking for now. I’m respecting his space, but I genuinely don’t understand how it went from perfection to absolutely nothing.
Can focusing on career lead to complete avoidance?
Post Opinion