<human>: Condense the text into a few key points

So I've (M18) been dating a girl for about 19 months now.  She's great, and everything is going just fine.  Her Mom just has a tendency to dote on me.  My GF (20) and I both attend the same overpriced private College, and we are both going to accumulate similar amounts of debt in order to graduate.  In addition, both of our families are cut from the same economic cloth.  That said, my GF's mom really spends a lot of money on me.  Last week her family took both of us to Cedar Point, where my GF's mother wouldn't let me pay for food, tickets, or even food out of the park.  Beyond that, her family went out for dinner that day, refusing my offers not to come, and insisted that I come, saying I was "Part of the family."  When I appealed to my GF to see if I could either pay or get dropped off at home, my GF caved under her Mom's pressure.  At holidays, it's the same deal.  I receive touching gifts for Birthdays, Christmases, even Easter from my GF's Mom.  Even pretty large financial contributions after graduation.

I try to make up for it any way I can, by doing dishes whenever I can, offering to clean bathrooms, or by cutting their lawn.  I usually get shot down unless I'm cleaning up a mess that I made.  Lastly, one of the things that makes me confused is that my family has never been that way with me, not less my SO.  I get big birthday gifts from my family, but at Christmas and for all other holidays my GF's mom splashes more on me.  My family doesn't really give me money unless it's some money for food if I'm going out of town, and for holidays and Birthdays they rarely give my GF anything more than a gift card, which is almost always to a place my GF likes... but I can't tell if my family and I are tight-fisted or if I'm being doted on.
<bot>: Girlfriend's Mom likes to spend money on me.  I feel cheap and I feel like my family doesn't spend money on my Girlfriend and I'm confused.