Help, I still have a crush on him

Hi guys, I already wrote a topic about this une June 2017 called A crush, or whatever you want to call it. Here's an update with more help needed.

Original post: Jun '17
My first year of highschool I see this guy and in that moment I knew I liked him. Still to this day, I am 18 and I have graduated, I like him. To be honest, at first it was only based on looks. I actually even told him I liked him via fb messenger ( kill me now) the last day of school my first year. He obviously didn't like me back. For maybe about 2 years I was "over him", we weren't in the same classes so it was easy. But then, we go on the same 2 week school trip, and I can't help but fall for him again. And this time it was worse, sure he was still hot ( actually hotter), but this time I fell for his personnality. He had a girlfriend, but just the fact that he carried a picture of her made me like him more. Finally, the last year of highschool, he was in my class, and he always teased me. During finals, we studied by texting eachother answers and pictures of how we solved problems all night ( he and I were those smart annoying people in class, and I am not bragging, it's just true). Anyhow, we now go to different schools but we sometimes text and see eachother at parties. I honestly really like him, so much it kind of hurts, but because of what happened the first year of highschool I have always been afraid to do anything about it.

I'm not sure if I want to get over him or if I want him to magically start liking me. The thing is how can I like someone this much and they not like me back? (how can the universe have this happen?)

NOW:

So... I ended up just straight up asking him out at a halloween party in october 2017. And much to my surprise, he said yes! I was just so shocked, and happy, and concerned he did it out of pity. Anyway, I text him maybe a day later, to check if he still wanted to go on a date sometime (i told him it was fine if he had changed his mine), but he said yes. Specifically: "I want to see you". Anyway, we plan a date and time, and then he cancels the morning of because he forgot he had a basketball thing. So we reschedule, and then he cancels again (i don't remember why). So i ask him again if he still wants to go out on a date, and the little piece of **** says YES! (Like tf?)...So i assume he is going to suggest a time and place, but no....he never texts me back. And, we never go on a date. Fast-foward to now (January 2019), we're both studying at the same school and we sometimes talk. Often he approaches me first because I prefer to keep my distance. He literally gives me a hug everytime we see eachother and is super friendly with me especially when he is drunk. He has been seeing this girl for a couple of months now (not dating, just ******* around really) and the other day at a party they kissed right in front of me. I thought I wouldn't care, but no, it broke my heart. I literally had to leave because i started crying (not drunk sobing, but genuine small tears of sadness).

I guess after all this explanation, all I want to know is what happened? Did he ever like me? Is he just amused by the fact that he is torturing me? And, most importantly, how to get over him? (I really thought I was...)