I was ghosted after 4 months and it sucks
There is this girl I'll call her Carrie she is [22F] and I am [22 M]. We met in high school because we were both in band and played the same instrument. We stayed in touch throughout the years by sending birthday and congratulatory messages, but nothing more than that. This changed one day in November when she sent me a reel on Instagram and then we started talking. It was very casual at first, we would send each other funny reels and we talked about things going on in our lives. She was working full time as an accountant and I was about to enter my last semester of college. In January I noticed a shift to flirting as she started sending me voice messages, reels about couples, and then in early February she asked me for my number. I was still keeping things casual because I had not seen her in years and she also mentioned using Hinge in January. The aforementioned flirting behavior continued in February and she would text me things like king, twin, etc.
In early March I sent her a message asking if she wanted to catch up and she responded the day after agreeing to it and suggesting a Boba spot. She apologized for taking a while to respond, but I had already noticed there were a few times she would take a day or two to respond. I did not think too much of this and we went out for Boba. It was great we both made each other laugh, we talked about events from high school, and we talked about life in general. We also hugged a couple of times, she took pics of me, and then she asked me for my Snapchat. That night she texted me that I should come back soon and I should not live so far. I told her I would and that I had a great time. She also messaged me that she could be big chilling this summer which made it seem like she pictured us becoming something more in the summer. In the following weeks we would send each other good morning texts here and there, snap daily (she saved some of my snaps in chat), and I started reciprocating more with flirty texts and reels. We gave each other nicknames, I told her I would cook for her, and she joked we should dress up as a couple from a tv show. There was also a day she texted me asking if I made it back to my college town safely which I really appreciated it. My college is around an hour and half away from my hometown, so it was a few weeks until we hung out again (this was late March). I suggested we get ice cream and she agreed so we went to a local spot. She paid for both of us and drove me around the block while singing songs to me. We then went to a dollar store and she bought some snacks for work the next day. We were laughing the whole time and she even started copying me. I do this thing where if I say a joke I pretend to shoot a three-pointer which she started copying. We went back to the ice cream place and she dropped me off. I gave her a hug and I told her she should come visit me in my college town which she responded maybe to. In early April I asked if she was doing anything on Friday 4/8. She said "idk wyd" and I told her she could pick what we do since I picked last time, but she did not respond and we did not do anything that day. Things started to change midway through April. First she stopped opening my reels on Instagram, we lost our snaps-streak on Snapchat, and then after that she stopped responding to my text messages. The last time she responded was on 4/15. I sent her a few messages after that with the last one being on 4/29. I did not mention how she was not responding I just sent her a message asking if she was okay and if she was surviving tax season. I was baffled because she would still do things such as like my stories on Instagram. I stopped texting her because she had not responded plus I was focused on my graduation which was last week on 5/10. I posted some stories for graduation on Instagram which she saw, but I noticed she did not like my related posts. As a last ditch effort I sent her one last message on Snapchat a few days ago on 5/14, but she has not opened it. I see that she is active on social media, but she rarely posts anything.
I am still really confused because I thought this would go somewhere romantically especially now that I am back home. I liked her and I was really enjoying getting to know her better. I did consider asking her out on an official date, but I was only in town for a day on 4/8, so I figured it would be better to wait until I had graduated and had moved back home in May. Also, I know April is a busy month for accountants, so I did not want to put more on her plate than she already had. On top of that we had mentioned summer plans like going to the beach therefore I did not see a reason to rush things. It is so weird how she just ghosted me when she did. Sure, we never called them dates and we did not have the exclusive talk or anything, but it still sucks and is incredibly annoying. If this was a stranger it would be different, but it hurts more because I have known her since high school and I felt a great connection between us. A part of me wishes she would reach out to fix things, but I know that whatever spark there was is probably gone now. I wish her the best though and I hope she is doing okay. I do not plan to reach out again unless she responds to my previous messages.
Do you think I did something wrong and if so, what advice would you give me? Has anyone been in a similar spot and if so, what did you do?