You would have to hang out with him for a fresh start. Then when he smiles and likes to hand out wuth you you ask him who do you like , but in private and don't tell nobody.
Of course it is!
go for it.... just ask them out...
Someone might like geology because they think it is an interesting and necessary science.
she might not be meaning to "flirt"
You might feel like someone is in your house because there actually is someone in your house. You might also get that kind of feeling if you are missing a person and wishing they were there with you.
There are quite a few branches of Biology that someone might like most. Someone might like genetics the most for example.
Sure there is no harm in it.
good are someone might get something that they would like and bad because someone might not be satisfied with what they end up with
Well it depends, if you like someone you might be poking them to get their attention, but if they are your friend you might just be poking them to cheer them up or tease them.
Only one thing you can do. Be a wannabe
Move on, don't waist your time, there is someone outhere for everyone and anyway ignoring someone might actually intrigue them
You don't. If he seems to like someone else, he does. Believe it or not, he is not the last guy on earth. You will find someone else, move on.