Unstable guy-love bombed me then ghosted

I just had a really toxic and upsetting as well as confusing situation with a guy. I know I have major self esteem issues and this did not help.

Long story short, I recently met a guy that seemed... off. He started love bombing me immediately and we kind of clicked the first first time we met . We were hanging out with another one of his friends who I actually knew. I ended up deciding to do coke with them and then to stay at this guy's house.

He told me he loved me and had never met anyone like me, etc. Basically I knew it was all manipulation looking back and I felt uncomfortable. I left the next morning and later that day we still talked but the day after we hung out again and smoked pot but that's when stuff started to get even weirder. I told him I had to leave and his whole attitude changed and he became really rude. After that he would barely send messages and told me he didn't think this was gonna work out. I just blocked him because he told me he didn't know how he was feeling about me. Idk what to make of this situation or his actions at all.

I knew in the beginning a guy like this was not good for me and I did feel uncomfortable but I guess I also liked the attention.. Why is this affecting me and why did he do this? If he just wanted to have sex then why not make that clear? He seems clearly unstable so is that all this is??

Please help. I tend to over analyze people and situations but I want to just put this toxicity to rest. Especially since it didn't last long and all happened so quickly.