SO is not the jealous type at all.. he doesn't care if I have guy friends or talk to my guy friends. I really don't have that many, except for the mutual ones we have now, but when we first started dating I did. Hell, I even added some random guy on FB at one point and SO told me to invite him over to hang out so we could meet him. Doesn't seem to bother him the least.
I think it's gone too far when you find yourself talking to your guy friends and trying to hide it.. if you feel the need to delete messages or wait until your SO/DH isn't around to talk to them, then you need to stop. Even if you're not doing anything wrong.. if your SO/DH isn't comfortable with you speaking to your male friends, you need to work on your relationship or get out of it.