Search Results: deciding between 2 guys

I am a good-looking guy, healthy, and muscular. But I am a bit insecure about the topic but I don't want you to sugarcoat it as a much more direct approach gives a clear answer with which I can make my future decisions accordingly. So the question is it (height) critical or is it something that is preferred, (I understand the evolutionary derivation of it) is it like boobs? It tends to have its own attraction to it but I haven't seen a girl being declined or ignored for being flat chested or no boobs or at least an attractive girl/person given no attention for the lack of the quality or is it like the face (the intention is not to judge because I think most if not all people who take good care of themselves, look healthy/exercise look good, and I am pretty sure of that) where it plays a deciding factor for most blokes... also I think/feel like mh height is more nutrition restricted than say genetically restriction restricted (I am the studious kind, you can also call it passionate extremist anyways, I would often miss 2-3 or even all meals a day, for like 2 years, although my father is not much taller. I'm 18 btw) is there any way to recover the height as I am slowly putting my body back on normal diet and exercise (bones felt weakened and stuff)
Also I would just like to throw in a little extra question, how does someone talk on online dating sites, I am a pretty straight forward person, so say a conversation has been started and are we talk about something, it's interesting then the topic is closed. I can't transition to the next topic unless it's initiated by the other person, maybe I just don't expect an extraordinary or an out of the ordinary answer or/and just am not curious enough, but I want to be, I genuinely do but I can't. There's no easy way that I see to transition between topics I know (I am smart in spots and I like to stay around those spots)

Note : do read at least the first half of the post before answering