<human>: Can you provide a brief rundown of the text in within 3 sentences?

(Excuse the formatting as I am on the phone)

I have been talking to this girl for about 4 months and we connected well. I felt a strong bond and was sure she did as well. We developed feelings for each other but never made an advancement to relationship status.
After a while, I just became infatuated with myself and began to talk to her less and less. Then I wanted to talk to her again and she tells me "Sorry, can't talk. I got a guy now, we've been talking for a month."

I found this news to be disheartening but I knew I had personally fucked up. I feel like I should talk to her about this, but I'm unsure if she is dating someone or not because she just said she was talking to him. At the same time, I feel like I should leave it be and just try to ignore it. I felt a good connection with this person and I really want to continue building a relationship with them.
Reddit, what should I do?

P.S. I'm aware that I'm still young and got my whole life ahead of me and there will be other fish in the sea but in the current moment, this thought has been stuck in my head for a while now.
<bot>: Girl and I developed feelings, I decided to focus solely on myself and stopped talking to her. Grew apart and tried to talk back to her but she has met someone else.