What is he thinking?

I have been seeing a Leo guy for few months now. Hes much older than me (hes almost 40 and i M only 24), divorced and has a son who's living in another country. We met in a business meeting and kept in touch afterwards. What i like about him is that hes honest with me and very funny. I know the fact that he's seeing other women and sometimes meet prostitutes, but I did not mind because I had always seen him just as a friend to hang out with. and I would not consider such a guy for long term. But recently, he has been acting quite differently. He told me he has special feelings for me and said even though he does not want to get married, he can see us having a longterm relationship. I have also started to like him more and more.

He never took advantage of me when we met and treats me like a gentlemen would. our date on last Friday was the first time he rubbed my back and thighs. i got a bit drunk and i was hoping he would take me to his place (I asked him if we were going back to his place) but instead he said he would send me home. he held my hand and kissed it while we were walking. Before I got home, I kissed him quite passionately and then we said goodbye.

I dont understand why he did not take the chance to bring me to his place , but instead send me all the way home?

I can only think of a few possibilities:
1. He has a gf , and has many female stuff at his place
2. he wanted to take it slowly and to treat me differently than the other girls he can easily get and sleep with.
3. he did not want to take advantage of me while I m a little drunk. Only wants to do this when I m sober
4. He has STD
5. he had another date with another girl after he had met me
6. maybe he lied about all those sex adventures - probably he has erection problem.
7. He wanted me to say i want it.

I really don't mind him seeing other women because I m also seeing other guys ( but i m very selective to whom i sleep with ) . hes a high achiever so i dont expect him to be trapped in monogamous relationship, especially after his divorce. But my ego was a bit hurt because that was the first time a guy rejected "my request" for sex (though it was rather indirect).

What do you guys think?