How can I get him/her to ask me out/ like me? If you like them then pick up the courage and ask them out. You can't make anyone do anything. Just focus on the things you can control and see if you can reach your goal
I'll second Love_is_in_the_air. "Does he/she like me?" Those ones always come with this long rambling of pointless and contradicting information. Everyone shows interest in people in different ways. It's impossible to tell for certain based on one scenario. Plus, as people get older, their techniques may change.
I must admit, though, I probably posted a couple of questions like that when I first joined the site. I think we've all done it at least once.