My guy friend and I have known each other almost a year. We met at work. He left and another job. We have been in constant contact since he left last winter. Recently things heated up. We exchanged pictures. He sent signals more I that he was attracted to me. I asked him how he felt about being a friends with benefits type of situation. My thought processes was why would he send me raunchy pics if he didn't want to sleep with me? Surely that means he's somewhat sexually interested. I asked him what he thought and I said he's not sure he's comfortable with that but wouldn't give me a reason why. What gives?