Hi Shawn,
Happy birthday to your daughter! And even though I personally think it ought to go without saying, it doesn't, so congratulations to you for being committed to being a part of her life even though you and your partner are splitting.
I guess the answer to your question would depend on her and the circumstances of your ending the relationship. Is this a trial separation that may end in you guys getting back together, or the type of thing where you'll see her for a total of six hours all year for the rest of your life? Because we need to understand the people around us in different ways based on how close to them we are. Also, what specifically you'd like her to understand or think she might understand by coming to this site. I'm not really asking you to answer these questions, I just think that you should have some answers to them for yourself.
People can get vindictive and evil over their kids and even though you guys are getting along for the moment, you don't want to give her ammunition for later on... I don't know if that's something you need to be concerned about or not but I would think about it. The articles on this site were extremely helpful to me when I was first trying to understand my boyfriend's abuse and the things he'd done in our relationship, but I would think that you'd want the forum to be a safe place for you to express yourself without having to worry about what some family court judge might think about it 3 years down the road.
As a parent and survivor, I have to say that the places where I've needed the most understanding and care from my partner, in terms of myself and my experiences, have been the places in my children's lives that "come up against" (I don't know if it's really a "trigger") my own childhood. Certain milestones, games, questions that my children ask, are hard because they remind me of myself as a child, and some parenting tasks (esp. the ones that relate to setting boundaries) are hard, because I really just don't know how they're done. I have found myself irrationally angry and sad at the sight of my girls playing and singing without a care in the world. These are the times when my boyfriend knows to step in and watch them while I find somewhere else to be, and he knows why. This is the best reason I can think of for your ex to understand what's happened to you. If you don't think she would be able to listen to you/ take over child care at that point, I suggest that you find someone else, a friend or other relative, who can do that if the need arises. (This has, up to now, been almost exclusively "my" problem, since our kids are girls and not yet at the age where things started to get bad for their Dad... that age is fast approaching for our big one though and there are times where I can see it affecting him, hopefully by that time I'll have all the answers for it

)
I guess also that when your daughter gets bigger there might be other concerns, about what or maybe who you want her to know, but I wouldn't put too much energy into that right now, we both know it takes enough energy just to keep up with the 1 year old

and if the important people in her life are nurturing and committed to her well-being and not fighing around/over her, she'll get on fine for now.
Anything else I can do to help, ask away or feel free to PM me.. good luck Dad!
SAR