Need Help

So I'm saying someone for almost 5 month now. He told me he love me he try his best really I can tell and pls. But sometimes but sometimes I have this feeling that his not sinser.

But then I have friend just a friend nothing Especial between us. I known him for two years. Before he got married last year I know he has feelings with me. But he didn't know that I know he has feelings. The reason he didn't tell me back then the because it Complecated. Not he's divorce and we talk almost everyday.

What should I do

Help pls