Girls, Should I apologize?

Sorry for the long message. This is random but I was in a long distance relationship for a few months. Long story short I felt like her interest in me was fading, she was taking me for granted, and I ended it. I know LDR isn't easy but I told her how I felt multiple times and it wasn't changing and I fell like it isn't something that she could, I think it was something only taking time apart could fix (not talking). when I ended it she didn't fight for it and just said "thanks for telling me how you feel". We haven't talked in nearly 4 months (doing no contact), we still follow each other on social media and she still follows my fam too. I want to maybe try to be friends and see if we could try again later down the road. Should I contact her and apologize? or don't continue no contact?
Girls, Should I apologize?
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