Is my husband gay?

Hi girls, I suspect my husband is gay or bi. I have been married to him for a year and a half and I think he has asked for sex only 7 times. I am always the one initating. He also.likes. to.do.it.from the butt a lot. I.noticed that when I get naked.he does.not.get turned on so he touches himself. When we do.it,he does.not like to.foreplay or is romantic. He just gives me a kiss and says turn around.Also,many times he says thatt he is tired or is too late. Often, he stays outisde our bedroom and waits until I am.asleep to come in. I think he is avoiding it. He also has no sympathy towards me. I gave birth 4 months ago and I.had to.beg him to.take.me. to the hospital. He has a best friend that he always answers the phone calls. His bestfriend calls him on FT. Even at a family dinner, he left the table to answer his friend. I think he is.hiding that he is.gay. I am starting.to.think he only.married.me since he is a pastor and wants to keep his job. Do you girls also think.he.is gay or.bi ? How can I get proof that he is gay or bi?