I'm just curious. Why do some of you women refer to yourself as the "step-mom" when you aren't even married to the BF? I just read yet another post where the OP has been with the BF almost 18 months and suddenly she is "step-mom". Noooooo, you are BF's girlfriend, lady-friend, lover, whatever but *you* are NOT the step-mom to these kids.
Yes, there's a difference. A step-mom implies that you have commited yourself legally to the BF and I do think it's an important title that actually has (or should have) meaning behind it.
A step-mom is generally taken more seriously than a girlfriend. IMO.
I'm sure you all have your own opinions so let's hear them! :)