What would you advise?

I got this new job, and I notice my boss of 66years being overly nice to me, always wanting to give me lift and I notice he doesn't do this with others while he was asking me about where I stay I told him and he immediately called an agent to get me an apartment saying the place I stay is far meanwhile there are some people working for him who stay farther than me maraba, yanya mandella and all but he didn't get them accomodations but he wanted to get for me so I told him I just renewed my rent and am not willing to leave that environment. He started telling me about himself lying that he is just in his early fifties and it was just a particular hair cream he used and a multivitamin that made him to have grey hair. When I noticed his overly nice character and I was uncomfortable about it I decided to open up to him Abt the fact that I was married before but the marriage became toxic and I left and I have two kids who are with my parents he sympathized with me and I tot he would just leave me alone I distant myself from him and turned down his offer for lift. 

One day he called me into his office and started talking about sex styles to conceive a son so I walked out I was really surprised because I respect this man from afar before applying to work in the office.

Since all this incidents I try as much as possible to avoid him and make any conversation with him very brief to my surprise he discussed about me with some staff telling them that am a single mother and my bad character and pride made me loose my marriage and when ever he enters into our office he would look at me in a disrespectful manner and act somehow towards me while relating well with the other staff members, few weeks ago he called me into his office and was asking me why am looking too fat, and I know his last child who is just 20years old who has never given birth is way fatter than i am, I just got this job and I don't like the bad energy already I may just loose my patience and talk to him in a disrespectful manner. He doesn't do this with the other two ladies there because there this particular lady working there that would have loved to be with him if she gets this offer but he keeps it professional with her. I dress well I don't expose my body I wear bogus cooperate trousers most times and my skirt is not skimpy he already has 3 wives and his first child is almost my age mate he has six children all girls and they are doing well.

I am just contemplating resigning from the job. Not that I won't get into relationships but not with my boss who is more than 30years older than me with 3 wives.