1. Guys & Girls CAN Just be Friends.
It is also possible that one has hidden feelings for the other, or that even both have hidden feelings. You have to ask to find out for sure, and if they're a good friend, they won't mind you asking.
2. Girls Can, Should & DO Ask Guys Out.
But girls, make sure the split is 50/50. If you initiate the first date, let him initiate the second. If you tell him you're interested, let him ask you out if he is interested too. You text him first sometimes, but make sure he is texting you first half of the time too!
3. When It Comes to Paying for Dates...
The one who was asked the other person out should offer to pay for their half, and if the one who did the asking insists on paying for you both, let them do so! Conversely, if you did the asking, you should pay for both of you!