I've used a CPAP machine for about 25 years now. I don't remember sleeping one night without one since I started using them. I have a few machines that I use for home and traveling. Don't give up on the machine since it is a real life saver.
Try other types of masks if you are not comfortable with what you have. You can go to CPAP.com and see the different types. I have used the nasal pillow type mask since day one. I currently use a "Tap Pap" which I really like. No headgear to slip off at night.
I had my sleeve surgery on 3/29/16 and hope I too can give up the CPAP machine eventually.
Good luck in your Quest to lose the excess weight!