<human>: Give me the gist of the text in a nutshell

For reasons that I'd rather not get into now, I [17/M] have a ton of disposable income (in the tens of thousands of dollars). Pretty much everybody (friends, girls, etc.) knows this.

Now, when I hang out with friends or go on dates with girls, I'm literally always expected to pay for everything. My friends want to go go-karting, for example, and they'll say "Ok, /u/WeekendAfterparty will pay for it". I've done that in the past, because the money isn't a big deal to me, but its gotten really annoying. I don't want to be seen as everyone's ATM.

I'm kind of a "yes man". I don't like disappointing people, so I have a tough time saying no. How can I say no nicely?
<bot>: I have a lot of money, people expect me to pay for everything, I don't want to. What do?