Why would a guy want to get you pregnant if he has a woman?

well this how it is I been talking to this guy for about 6 months and messing around with him and at some point I think he wants to get me pregnant but for what reason I don't know he got a girl friend but she

don't treat him right sometime and that's not all he does sometime he call for 2 weeks straight and then he stop calling and I don't think its about the sex I think he is confuse and don't wanna fall in love with me but he can't help it