Sorry for your struggles. It sounds stressful and I hope you recovering well after surgery

Unfortunately I have to say that his reply to you and lack of communication after that likely indicates that “relationship” is over. If he was interested to continue it, he’d respond differently

I put “relationship” into quotes because it seems to be way too early to call it a relationship. It seems that everything was evolving way too fast before you two got to know each other. Then it crashed. Unfortunately it often happens like that.
After dating for 3 months and not even seeing each other often he took days off work to go to doctor appointments with you. That kind of shocked me. I’d do it for my husband of course or mother or daughter, not for someone I barely know. I also absolutely wouldn’t want someone I just met going to doctor appointments with me. It seems that you two rushed into something without knowing each other well.

As about what you should of could do, I think you need to completely stop contacting him. When people don’t respond to you, after few attempts it’s wise to completely back off. I think you shouldn’t deliver any gifts or send/write anything anymore. I am a bit taken aback that you delivered a gift to his work place, which really not simethung one needs to ever do. I’d block the person from everywhere after that. It would completely freak me out. And it would make me extremely embarrassed too because typically gifts aren’t delivered to the main office for high school teachers. And the office knows you aren’t a parent of one of the students, so why are you, a stranger, delivering gifts there (and it had whiskey in there?), why not give gifts directly? And not at work. It likely raised questions in the main office.

I understand it hurts. And his lack of direct approach and ghosting act doesn’t show him in favorable light so you maybe dodged a bullet here. He might not be the right kind of guy. Decent guy would be more direct. Although again he possibly just freaked out.