"please pay me, i will pay back"

no you wont.

"well, once you gave it for free, why don't you give it now?"

is the word "gift" familiar? also, i have complete control over my finances. i can do what ever i want with my money. so you have to go on the assumption that others don't support you. it's my money, not yours. it's not an indivisible human right to get money from me. i'm not a social agency.

"you're not a real friend if you don't pay for your friends"