Sure, you can get HSV 1 or mono from kissing. The percentage of the population that has oral herpes is huge, even kids have it. You'd probably have noticed a sore on her lip though you can get it even if it is before the sore forms. Mono is a virus and yes, you can get it through kissing. It usually happens in teenagers though. You are probably too old to have this be a true concern. But it's possible.