friends, i expect to pay my own. since ive been in school, they don't let me pay and instead request things like cupcakes and liquor next time. they know when i have flow, i'm always down to drop it when we go out.
dating, i also expect to pay my own. i always offer and i'm hesitant to put my wallet away. guys can pay but i'll want to pick it up next time. i don't go on too many casual dates so my lines on whether we're hanging out as friends or going on a date are really fuzzy. i usually don't realize that i've been on a date until after the fact when my friends are going ".....so you went on a date then."
relationships, still expect to pay my own. however, i like to buy presents..doesn't matter if there's a holiday or not. if you've been driving, paying for gas, and food, etc. and waving me away when i offer then i'll buy you something that you've mentioned to me previously that you would like or need as my form of gratitude.. car stuff, tools, new belt/wallet/shoes, etc.
pretty much in either instance, you can pay for me but i will reciprocate. i'm pretty sneaky so i'll find ways to pay first