am i a good mother?

You know you are doing this for your son's future. If you are left with no choice but to be away from him just to support his needs (if you really can't find a work near where you can be with your son all the time) then there's no need to be guilty. Don't question your capacity as a mother. A good mother loves her child. We have different ways of showing our love. That's your way of showing just how much you love your son. Nobody must question that.

Life is really hard now a days and I can't judge you you because I too am guilty of the same thing. although I do go home everyday, but most of the time I go home when they are all asleep. If you cannot spend quantity time with them, then have quality time with them. Make all the time count meaning make your stay worthwhile. Spend all of your remaining time with him talking to him and tell him stories of what you do so that he will have something to tell his friends. Get to know your kid more, ask your in-laws what he likes and tell more of your self to him. Bring him pictures of you from you work so he'll have something to show his friends.

Being separated from your son must be very hard for you. A lot of children don't acknowledge their other parent because it is a way of rebelling against the situation. As long as you know you are doing your best, don't worry about it. I personally think that you are a good mother. Otherwise, you would have not put him in the best situation for him and wouldn't be working so hard. Don't pick on yourself so hard. Smile, you are doing your best for your son. :-)