A girl I liked suddenly became distant and I don't know how to react

I have a history of mental health issues do to my autism and depression, but about 3 weeks ago I met this girl and she made me feel really cared for and loved, something I don't really feel much nowadays. She heavily flirted with me and I ended up catching feelings for her. For about 2 days we flirted back and forth and now shes put a massive wall between me and her. I get only one word responses out of her and when I ask to hang out she says she's busy but I've played Xbox with her and her friends and I see them together all the time. It took me completely off guard and caused me to spiral into a suicidal episode. Worrying that no one would ever love me. After I calmed down I told her how I felt with the distance between us and tried to open conversation in case I did something wrong. Her response was just that she's busy playing with a friend. Not acknowledging anything I said. Should I just accept that she's not interested and move on? I really liked her and it pains me but maybe I got attached too fast