I cannot decide whether to proceed with an abortion or not

I’m 4 weeks pregnant and I cannot decide what i really want to do my relationship isn’t stable with the guy I got pregnant from he on the other hand is not certain and scared of the decision I have no support from him to keep it or neither to remove it…my family is against of keeping the baby since my partner is unreliable and cannot make decision.. he expect from me to still be with him after the abortion but I do not think I am able to do so since deep down I wish to keep this baby.. I’m scared of the future with a baby and being on my own dealing with problematic person like the guy I got pregnant from.. I’m also scared of my mental state after the abortion I do not think I can take it easy.. I just don’t know what to do I feel helpless and lonely I feel everything is against me and no one understands me