*Side note: Guy #1 doesn't do much, he doesn't talk to a lot of people and the only time he really talks (via phone) is if you get him involved with a convo or if you're hanging out with him (while hanging out with him he's a really fun guy). Guy #2 always tries to make convo and asks to hangout all the time.
Most Helpful Guy
One thing you should know about guys is, we are territorial and don't want other guys touching what's ours. Since you they're mutuals it's up to Guy #1 to accept you for you or not. But give it a shot, try to meet him. If he can't hang out with the 4 of you for any reason, go to his place when he has time. Make it about the two of you, just the two of you only. Good luck.