Dear Gemmy, I hear you but I hear some untrue thoughts you expressed in your opening statement. You say you have no purpose, so who is responsible for your child...you, of course. A child is a gift and a beautiful bond God creates for us. They need someone who cares to guide them and love them.
Don't you think you're important to your child, you sure are, so you can't say you're not important to anyone.
Something good happened to you, your salvation/Jesus, child, prayer partners here and so on.
Never ever could I think God, who sent Jesus to suffer for us, would want a precious mother with a child to suffer or think He wants you to.
From what I recall, it's your choice to remain with an unstable partner. He is not your burden to fix, only God through prayers and the person's attitude can help. As long as your with him you are putting yourself in an unproductive disappointing spot.
Remember, God tells us to 'bring ALL thoughts into captivity' and 'pull down strongholds'. As long as. you let yourself be abused it will be hard to think right.
I'm praying the Holy Spirit, our Helper/Comforter, will touch your heart and bless you with his love and truth and deliverance. We are believers in God and know He honors His word. 'My thoughts are for you and not against you, says the Lord; thoughts of peace and not evil, to give you a future and a HOPE' Jer 29:11.
Trust Him He is still the God of miracles, love and restoration. God bless.