Sadly, half of marriages end in divorce. Half of my girl friends and male friends have been through one, and their kids are doing great. There's no shame around it - unless you want to project that on to yourself - but certainly there's no longer cultural shame. Everyone is walking through it.
What I consider a good part for a woman and what some other Hollywood people think are good women's parts are very different. I don't want to play the supportive girlfriend who has nine scenes and just loves that man, maybe cheats on him in one scene but will always be there, and I mean - give me a break.