I’ve been talking to a guy from my college for 2 months, but found out that he had a girlfriend for 3 years and ended up confronting him and blocking him, on his birthday. Was it the right thing to do?

I’ve been talking to a guy from my college for 2 months. He came into my life when I was feeling lost and very sad. When we started talking, he would give me gifts and come to my house. One day, we even kissed. But at some point, he stopped coming. But we would still continue to talk. He was very sweet, always been there for me when I’m sad, try to make me feel better and motivate me all the time. He was a person who I could tell everything. I felt very comfortable with him. And yes, I obviously got attached to him. At some point I started to have feeling for him. But didn’t understand why he doesn’t want to meet up. He always made excuses that he’s busy with work , school etc. Recently, I found out that he had a girlfriend this whole time, that’s when I to keep distance from him. Few days ago, a friend of a friend invited us to his house to drink. What I didn’t know is that friend of my friend lives with the guy I’ve been talking to. Me and that guy were still talking that day, but after I’ve been to his house, he all of a sudden disappeared, stopped replied to me and even turned off his ‘active now’ on instagram. Weird, isn’t it? The day after I’ve been to his house, I found his girlfriend instagram and saw that she posted their photos for their 3rd anniversary. That completely pulled my trigger. Even though it was his birthday today, I decided not to wait and confront him about this and just block him. He later also blocked me and his girlfriend blocked me too(idk if it was actually her or him). It just made me furious the fact that he did everything to make me special and take care of me yet he had a girlfriend. I absolutely betrayed. I once again feel like a side chick. Even though we were not in a relationship he made me feel like a side chick. It hurts to be in this position once again. Honestly I don’t know if I did the right thing by confronting him and ending things with him especially on his birthday. It felt right at that moment, but I don’t know if it was actually the right thing. I feel so confused.