M19 i need help because i can't understand girls

So i was talking to this girl for about 2 months now and she normally texts around fixed afternoon hours (we're both jee aspirant). It was okay at first

One day i got annoyed when she read my message a day after, i texted like i think its my mistake to text you because you're busy in studying and all. I didn't message her for few days

After around 2 weeks i thought I did something bad and i should probably talk to her, but then she is just dragging that message, like "if you think it was your mistake, you shouldn't do it"

Help me, im writing this at exactly 4:02 am because its bothering me too much, I'll answer more of questions in comments.