Should i feel bad???

So in September 2016, i had a crush on this girl. We started going out in January and it was fine, she was really sweet but idk. I felt fake and held back the whole time, i was really quiet and shy with her which is not like me at all. Then, in like October, i met a guy through my close friend and we immediately hit it off. I didn’t do anything with him bc i didn’t wanna cheat on my girlfriend at the time and i respect her. But around November my girlfriend asked if i had lost interest in her and told me that if i wanted to breakup she wouldn’t mind. She put me in this weird situation. Eventually i did break up with her and i blocked her and our group of friends bc they kept messaging me and telling me i was a bad gf/friend. I started going out with the guy i met and i couldn’t be happier. Recently, i started thinking about how weird it was that i got over her so quickly and that i started dating another person like within less than a week. Should i be feeling guilty or am i just overthinking???