What form of birth control, if any, should I use?

I have not used any form of birth control for about two years now. (I realize this is super bad! Please don’t lecture me too harshly!)

Details!
– I used to be on Ortho Tri Cyclen Lo. I was really, really awful at remembering to take it. If I tried again now, I probably would not be any better.
– When I ran out of pill packs one time, I just stopped taking anything entirely because it wasn’t like the pill had been doing anything anyway, since I was taking it so infrequently.
– I probably have fertility issues. I have been having sexual intercourse regularly for these past two years (4–5 times per week), and I have not gotten pregnant, despite the complete lack of birth control.
– I do not need the birth control to protect me from STDs, as I am monogamous.
– I am against using condoms in a relationship as I detest how they feel and also feel as if they detract from intimacy.
– I tried Nuvaring. It rubbed against partner’s penis (very uncomfortably for him) during intercourse.
– I am worried about weight gain with Mirena, and I am also uncertain as to whether it would be covered by my insurance. (If it was not covered, it would cost around $1600.)
– My gynecologist advised against the patch because she said that, after sticking it in one spot for too long, skin becomes discolored, and there are only so many discreet places you can put it.
– I am 23 years old, and I probably do not ever want to have biological children.
– If I were to get pregnant, I would have an abortion, but I don’t think abortion should be used as a form of birth control, and since I’m not on birth control, I guess that’s what I’d be doing.
– I have the worst periods in the world. Unbelievable cramping, completely disabled for first day of period, short cycles, long heavy periods. I probably have endometriosis.

Given these details, what do you think? Should I just continue to use nothing? Something else?