Confused

My ex and I had been dating for 4 months, she became distant the last couple weeks. I'm not really sure of the cause, maybe she felt unimportant to me. When she broke up with me, I asked to meet up, but she didn't want to, she said there was no point because she had made up her mind and that she didn't want to be in a long serious relationship. Right after the break up, I went into no contact to become a better person, heal up, and give her space. It had been 10 days of no contact and she messaged me an emoji of a heart, I looked at it, and carried on with my life, I thought maybe it was an accident since our messenger emoji is a heart. She sent another 4 hours later, I thought to myself, maybe bad luck? Finally, before I went to bed she sent me another at 12am . I ignored the messages, 7 days later, then she unfriended me on Facebook. I got so tired of playing these games that I decided to break contact. I messaged her the following:

"Hey, I was watching a soccer game the other day with some friends!
It made me think of how fun watching that football game at ***** was !
If you're wondering if I still care, I indeed still care about you **** *****."

ps: I'm 21, she's 19 if that makes any difference.

Thoughts? I don't plan of messaging her again if she doesn't reply, but I do still care about this girl. I don't know why she keeps screwing with my head.