Iv been with my girlfriend for over 4 years, and she got a cold sore about 6 months in (she's been getting them since she was about 15). I just avoid kisses when she has one, and when she doesn't have one everything goes as normal.
I have never developed a cold sore during these 4 years, everyone who says they would keep clear is just a douche.
Warning If you do date a girl who gets cold sores, don't let her go down on you when she has, or has recently had one, as you are asking for herpes. I assume people know this already...
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Velcro - what a rip off.
Congrats SuperNiceDog, Oracle Team Mate and Guru Champ!