Is my man gay?

For many reasons I think that my man of 8 years who is the father of my 3 year old child is gay. He is super vain, pes for gay, recently started makign really cr and phobic gay jokes, has had gay escapades in his past, is not so interested in with me all that much although we used to share a very vivid and adventurous life. In principle I have no problem with him being gay and he is such a great dad,but I want us both to be happy. I really think he is more in denial than I am about this. How do I approach this? I am positive he will deny the are you gay question! If he is gay I want to move on with my life. Otherwise I will go crazy with the ual droughts that he insists are because he is tired or because I am fat (I have gained weight yes but he is awful about that too although it is partly his fault that I am fat now. I want a man to cuddle up with. HELP