Trust issues with new guy

Hi,

I would like to hear some advise or opinion about a situation with a man - thank you.

Basically, I met a men at a conference (we are in the same profession) and we stayed in contact. He has a teenage son (lives with mum) and he was never married. After many emails I went to visit him and it was really nice meeting up and we got a bit together (no sex). He talked about the mother of his child perhaps a wee bit more than I liked but it was okay. The second time I came to visit we went for dinner and he tried to hide that he went to see a female friend with his son the previous saturday who lives about an hour away. I just asked some questions, as "so, your son and the other boy met up, where were you?" And after some strange answers he told me that he spent some time with the mother of his son's friend. I was quite disappointed that he felt to hide this information - there it nothing wrong with having a female friend. Especially, we were just at the very early stages of developing a relationship. After some more questions, he said that they know each other for 15 years but in the past something happened between them. Nowadays, they are friends and if she wanted something he probably would not want to and vice versa. But I had the feeling that there was maybe more to the story.

Now, I am wondering, whether I can trust this man? I am a bit confused because I like him and find him attractive, but my objective judgment is a bit off at the moment.

Thank you very much!