I know this might sound pretty shallow, but after almost two years my bf has changed. He's good-looking, just a little skinny. I don't know why but he seems to be less and less masculine. He acts a little nerdier than before, and I wish there was a way to let him know... without hurting his feelings too much. He wants to be intimate with me, but he doesn't understand that certain little things that he does are often unappealing. I wish I could just say "You know, I'd really be all over you if you acted a little more manly and started working out." but of course that would be awful. He's a really fantastic guy, but there's just something lacking with us... what should i do?