If you feel you've given too much of yourself, and aren't receiving anything in return, then yes - reevaluate your relationship. Your own emotional health is important.
That said, I was married for 17 years before my ex and I divorced. I felt that over time, I'd lost too much of myself, given up too much and received very little in return. I was told that I was selfish for wanting to be who I am, for wanting connection with my friends, for wanting to go out and do things for myself (running - it took me away from the kids
), that type of thing. These things can happen in any relationship, sadly. Poly can be a catalyst, but in my personal experience, I've found that it's rarely the only reason for many of the issues I've had in my current relationship.
If your partner is disrespectful of your needs, then poly or not, there's a problem there.
Mono. Divorced, two kids (DanceGirl, 14; and PokéGirl, 11), two cats, one house, many projects.
My partner. Poly. In relationships with me, Xena, and Noa.
Poly. In relationships with Chops and Noa, and dating others.
Married, Poly. In relationships with Chops and Xena (individually).
Blog thread: A Mono's Journey Into Poly-Land (or, "Aw hell, there's no road map?!")
Slightly more polished blog with a mono/poly focus: From Baltic to Boardwalk