Do you think its bad that I'm going to talk to a guy my boyfriend doesn't want me to?
Why would you want to do that?
He's a good friend and I just want to catch up with an old friend.
Is this going to cause a big rift in your relationship. Sometimes it is good to just respect the wishes of your boyfriend if it is just going to lead to a bigger issue.
He doesn't have to know. It's not a big deal.
There must be some reason he doesn't want you to to talk. You should discuss the issue with him and let him know how you feel.