its socially acceptable to pay for something for a woman. A drink, a fast food meal etc. buying everything for someone who is in a relationship will give the wrong impression. When i go out with a friend of mine ive known since school (now 24) we go halfs on everything. Or she gets what she wants and i get my stuff. Don't get hung up on who pays for what, talk to her about it, if your friends you will have a good laugh about it. trust me.
If you need any advice pm me im very good at reading situations and people.