and this is other:
http://www.youtube.com/watch?v=EYXHov3dCNI
The above poster doesn't know anything about HIV transmission. At no time were you at risk of contracting HIV from kissing.
This is from the CDC website.
Open-Mouth Kissing:
Open-mouth kissing is considered a very low-risk activity for the transmission of HIV. However, prolonged open-mouth kissing could damage the mouth or lips and allow HIV to pass from an infected person to a partner and then enter the body through cuts or sores in the mouth. Because of this possible risk, the CDC recommends against open-mouth kissing with an infected partner.
One case suggests that a woman became infected with HIV from her sex partner through exposure to contaminated blood during open-mouth kissing.
So to answer your question you have little to worry about.