5 months is nothing..really, it's not! fair enough if you're pregnant and you're adamant you want to keep it then have it, but don't get married! it might only encourage the father to walk out on yopu even more because your both young so he might feel tied down and want to escape.

You even said a reason for you wanting to get married is so that he has less chance of walking out on you, well you just said it yourself really, you obviosuly don't think your relationshiop is going to last a lifetime, so why brign a baby into it and get married?

It's not hard to see what everyone else views on this are ^, take it on board.