I need some help understanding girls?

So there's this girl, I talked to all the time online on a social networking site. But we've never met. She talked to me night and day, and we called each other best friends. She told me she loved me, she asked to text me, put me in her top friends, and even came to me for advice about her boyfriend problems. But recently she hasn't been as in it as she use to be. She hasn't been on the site as much anymore but we still talked, and one day I confessed to her that I really did love her and I want to grow to be more than friends. She seemed to take it well, by saying" IDEK know what to say, But I love you too Joshy<3! After that we seemed cool and what not, til one day she just stopped messaging me. So instead I text her and she answered immediately and I asked her why didn't you message me wat's up with that" She says Nothings up with that O.o.. And then says IDK. I asked if she was getting bored, and she says Noo... Not at all. I just wanted to know If She is getting disinterested but doesn't want tell to me or, not feeling it ever since she broke up with her boyfriend. IDK. I really like her though.