Stress emotions

I need advice on how to start a new life.my. Am loosing it already, my marriage of 3years with 2years old boy is crashing. Am 24 he's 40...my husband has been cheating on me with different lady's. He don't care about my feeling at all, he don't take care of me and my baby, despite the fact that we don't stay together because of his job whenever he's around we don't spend quality time as husband and wife... he don't buy me gift even if is my birthday or valentines I buy for him, he don't value it. Am trying my best to keep this marriage, but my husband don't care. Last time we had a quarrel and I told him am tired of his bad attitude and he told me if am tired I can leave. That when the first wife tired she left, because he got married to lady b4 me, they had 2girls together before she left. Anytime I complain of his bad behavior towards me he will said his mum died early nobody showed him love, so he don't know how to show love... Am tired am planning to leave the marriage but I don't know how to go about it because I don't have anywhere to go. No house, no parent. And I don't have money to rent an apartment. I need advice on how to start a new life.