Your question was: If you found out your live-in boyfriend is on match.com what would you do?.

Too soon by whose standards? each couple is different.  do what you both want/agree on...

As long as you feel you have a good handle on his good and bad qualities, have the same values, see life similarly and have mapped out your expectations about what is a good/bad spouse and things like how do you handle financial issues, exes being a part of your lives, drug use, sexual issues/compatibility,  is weight gain a sufficient reason to break up, etc. ...and you see that you are solid in those areas...why not plan for a wedding?.

Good luck!!..

I would enjoy a long engagment.  Though you have knw eachoter for awhile you still have only been in a relationship (thru Match.com) for a short time. it is really great that you guys are friends first...

Well what's the rush, setting a wedding date using Match.com after 4 months?  Continue getting to know each other, being exclusive but perhaps idea of wedding doesnt have to be as front and center?.

,..

<< He asked me to marry him after 4 months of dating, is it too soon to talk about a 2009 summer wedding?  >>.

IMO, yes.  I wouldn't start planning anything yet.  Get to know each other better and if all is still strong and going well ... then, discuss moving forward on your plans.   I cannot fathom getting married with only a year or so of dating!   How about summer 2010 ... what's the rush?  That way, you'll have much more time to get to know each other and make sure it's right...