Thanks everyone.. you are right, I don't want to fuck up their relationship, its not cool. We got ourselves in a sticky corner and now we have to figure out how to move on, nobly.
I actually suggested to beth we end it, or I go find another partner that will meet my needs. She wouldn't accept that. She says she needs both of us, that Mark and I together fill her relationship needs and access different parts of her.
But I know I need to just decide what it is I want. If this doesn't work for me, I need to be an adult and say so and work on finding what I need.
Shitty timing. I'm learning. Trying to be a Jedi. WOrk on my honesty. First step, learn what I want.
Thanks for kicking me in the ass!