Is my dad a deadbeat? what should i do about it? (long)

Currently around 18, and live with mom. My life isn't terrible, its pleasant but not perfect. We both aren't rich but we make do with what we have, live in small rented apartment with a nice landlord who often runs into me in the halls and gives me life advice and follows up on how i'm doing. Often times the advice is a little silly but i appreciate his interest and in a strange way its nice to have somewhat of a father figure around following up on my life. My mother and I eat dinner together, save money together and try to save up for the nice things in life. its hard though, especially seeing other people my age blow money away like pulperi on cars, and dinners with their girlfriends. I know i can't do any of that, i can never relax and lay back, even on my day off's my work calls me in and i can't say no because i know that we need the money so we can one day live better lives. It kills me every time seeing friend of my talk about trivial college problems like which color infinite to get, while my mother and i falling into bed each night working 6-7 days a week just pay the bills.

The thing that pisses me off about all this is my father. He unlike my mother has no problems with money, he was a white collar job, a near million dollar townhouse and a girlfriend who also makes similar income. He divorced my mother when I was a kid and at the time he put her into a great deal of dept with his overspending, he ruined her credit, then after they got into an argument he kicked her out of the the house. The interesting thing is during these financially hard times for him my mother would still pay for his medicine even while separated just so i would have a father still among the living.

Now looking at things now the tables have reversed, its almost an insult. He lives happily and comfortably with his girlfriend in their newly bought townhome and now own a vacation house in a neighboring town which he uses on weekends, he has a new car, bi-annual vacatoins and probably 10x less stress than my mom and i have ever had. The whole thing just pisses me off to the extreme. The worst thing about is when he will call, often out of guilt because i only see him once every few months, he'll talk about how lucky i am to come from such a good family. he'll go on and on about his genes give me the capability to do great things, while not helping me and my mother at all financially. He will trot me out to at his friends parties perhaps to make us look like a normal family while laughing and making fake jokes with me about our relationship to make us look fun-loving, but he has not helped me or my mother for years. He makes all the money in the world, but would rather blow it on a new massage chair than than the people who were his family for years. My mother worked so much she has developed heart problems, and i have major stress issues because i'm never able to decompress due to my intense works schedule just to pay for my college. What should i do? should i just straight out law down the law with him on what i think about him? if so what should i say? i'm just so frustrated with what he has done to us and how little he seems to care about how his past actions and current inaction's have effected us?