custody

if you were not a legal gaurdian, you most likely have no leg to stand on.

step parenting can have painful repercussions...

and common law marriage isn't acknowledged in Michigan so I think i'm pretty much screwed

No the kid is screw, if a father figure is being taken away from him/her.

Suggest you see it whatever fences with your ex-love that had been broken can be mended at least to the point she can see the benefits of having someone who have such a relationship with her child still being in that child life.

Most states acknowledge de facto parents -- a person who has a long standing relationship with the child who as taken on the role of a parent. Unfortunately, Michigan isn't one of those states.

The good news is that Michigan is a battleground state for de facto parenting rights, and the laws are being tested. The people at the forefront of the fight are the LGBT community.

Look for an attorney who specializes in family law and who has the endorsement of the LGBT community. Set up a consultation and see if they think you have a chance.

Be aware that along with visitation you'd be on the hook for child support if you're declared a de facto parent.