I have been hanging out with a female friend for a few months. I like her romantically, but she is also a really good friend and I don't want to lose the friendship by making a wrong move. So I am trying to figure out whether she feels the same way about me or not.

We meet every weekend and stay usually till around midnight. The only issue is she takes a really long time to reply to my messages. Now normally this would be fine, except I can see when she comes online, and she's online all the time. (We use whatsapp and I can see her last seen). A few times I've told her that I would like to speak with her before she goes to sleep and almost always she forgets and texts the next day that she fell asleep.

Also I didn't think this meant anything initially, but she sends me a blue heart quite often, instead of the red heart.

Does all this indicate that she definitely doesn't like me? We're both in our 20s. If this seems childish, it might be because I am really new to dating.