Going back to the facebook thing, actually I quite often 'like' all of someone's posts, it means I like their posts - nothing more. I also make eye contact & smile with people I like, it doesn't mean more than that. Again not saying you're wrong but it would be sensible to keep your feet on the ground until you see she really is interested in a romantic relationship.

Assuming she makes a move on you, if you choose to decline you can do this in a kind and sensitive way so as to not hurt her and keep her friendship - perhaps explain you are not in a good place right now. It doesn't have to be all or nothing.

If you do choose to make a move yourself and she reciprocates then her having a child is no bad thing IMO, if you tend to neediness the needs of a young child could be something that takes you out of yourself and makes you focus on the needs of another. At least you are self aware of your neediness in the first place.