Mark, I just simply plan on telling her that i don’t think we are compatible.  Not as families or lovers.  That the amount that we fight and disagree and have issues with our children and our children having issues with each other is too much.  That in fact it is reversed.  What i mean by that is that for the amount of time we fight or have problems is the amount of time that we should be happy and all getting along and vise versa.  I’m going to tell her that I’m just not happy like I should be and my girls are not happy either.  That we need to be on our own.  That I need significant time to also rebuild my relationship with my girls.  That I just can’t do this anymore.  Feeling guilty and responsible for her happiness and wellbeing.

Just jumping in to say that this sounds good. Solid reasons.

Also, I know you’re feeling guilty, but guiltiness implies a responsibility for a specific wrongdoing, and you are not the only person at fault for the downfall of this relationship or for her feeling hurt. You both contributed in your own ways. Although it’s totally understandable to feel sad or down, try to reframe it in your mind so that you know you aren’t the “guilty” party, she is not the victim, and that blame is shared quite equally in this case. People feeling hurt is a natural byproduct of situations like this and no one is technically at fault for that either. You both have hurt each other so no one is specifically to blame. It’s both of you. It might help you with your resolve to actually go through with the breakup this weekend if you’re able to get over that guilty feeling a bit.