Should I leave my husband?

My husband and I have been together for 7 years, married for 3, and we just celebrated our daughter's first birthday last month.

For nearly 6 years of our relationship, we've shared a house with another married couple and their daughter. We've had our ups and downs with the couple, and for reasons too long and stupid to get into, we all agreed to stay in the house together until THIS year.

Let me just say that my husband is a good man and I love him very much. He's never tried to hurt me in any way and doesn't even raise his voice when he's mad. If anything his biggest fault in all of this is he's too much of a pushover and tries to please everyone (unless it's me vs the housemates).

We've all spoken about it several times, and the plan has always been that we would sell the house (in my husband's name) to the couple and we would move out.

Now that it's time to get the process of selling started, the couple is dragging their feet.

I've asked my husband countless times to put his foot down about selling the house so we can have our own place. These people are serial procrastinators and I'm sick of always putting our life plans on hold while they get their sh*t together. We need the money from selling the house to help with the down payment on a new one, so again our lives are on hold waiting for them.

I'm so stressed about the whole thing on top of the other daily bullsh*t of theirs I have to deal with (for reasons to numerous to list), to the point of severe depression, crying several times a day, cutting again, and having thoughts about wanting to kill myself if it weren't for my daughter and what it would do to her. It really feels like she's my only reason for living right now. I've told my husband all of these feelings and it did upset him, yet nothing.

Every day I think that I should just take my daughter and go stay at my mom's until my husband decides that the happiness and future of his family is more important than upsetting our housemates with a confrontation, and making them fulfill their end of the deal.

Am I overreacting about this and wanting to leave him to stay with my mom until he decides to put me and my daughter first for a change?