To clarify before anyone has concerns, I'm a postgraduate student, I'm 25, he's 30.
I'm on a MA course at an institution where he also lectures undergrad students. Can't say I thought anything of it at first but I have built quite a good friendship with him and I'm starting to sense some flirtatious behaviour.
Would this be totally and utterly unreasonable? Or do you think it's ok for postgraduate/older students to date staff?