Is my ex-boyfriend gay? Never considered it before, but my psychologist brought up the subject...?

Does it matter? The fact that there is no passion between you suggests he may be gay. On the other hand he may just be a very passive man without a high sex drive. And of course there are people who call themselves asexual, who dont consider themselves to have any sexual impulses towards anyone. I'm not sure it matters what the reason is for his behaviour and attitude, it's more important that you, knowing how he behaves, and the lack of passion between you, think about whether this is someone you want to commit to in a romantic sense. He obviously values your friendship, and since you were too upset to stay "just friends" with him before, perhaps he is trying to provide you with sex in the hopes of not losing your friendship. I dont think you should ask him if he is gay, I think you should have a long talk to him about what he wants, after you've thought about what you want. It sounds as if he might be happy to have a close friendship with you while you pursue intimate relationships elsewhere. Talk to him about how he feels and what he wants, rather than trying to pin a label on him.