My girlfriend and I had met online a month ago. We had talked and texted each other every night. At first, it was like we were bestfriends, partners. We even spent the weekend hanging out, and had a great time. Now, it has been 4 days. Whenever I text her, she doesn't reply to my messages, but yet doesn't say that its over. What is going on? Does she still care about me?

Probably got tired of the idea of long distance... maybe she found someone else.

Stop throwing the word "love" around haphazardly. You have known her a month. You still don't know everything about her including why she would stop calling you. You might have been in infatuation with her, but what you had isn't love.

Wait and see if she contacts you soon. Maybe she is thinking about it. Who can know but don't be a pest about it.