I detected no hint of suicidal tendancies in your synopsis of what happened. It sounds like a match made in heaven. Although your views, experiences, and likes/dislikes may be different, she seemed like a girl acting they way I would expect a typical girl her age to act. You guys are in your early 20's. I dont see anything odd weird about the way either of you acted. In your 30's or further down the line you both may treat the experience in a different way.