If he is in a relationship or dating somebody, don't be afraid to still talk to him. Flirt with him subtly; if you do it properly then he will subconsciously flirt with you back.;
, Hold eye contact with him, smile, touch his arm while laughing, be assertive. Don't be afraid to make the first move.
 It shows you're interested and you want to get to know him. Don't be too pushy, but slip in the occasional 'what is your opinion on that?' 'Do you like this/that?' It makes a difference.
 It will show you're confident and keen.
,,,, If the date is awkward and you decide you don't like him, tell him you should just remain as friends. If you still like him, but you're convinced he doesn't like you back then play it down - don't communicate as much for about a week and then start flirting again.
Make sure that the guy you like is single.
Flirting is such an obvious factor, but it's an important one.
Once you've started talking to him, ask questions.
Once you've started talking, try calling him - but not too often.
Once you're calling, flirt more, which will turn into a good, flirty friendship.

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Now, if he hasn't asked you on a date; you will have to, if you really want him.

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When you're on the date, be yourself and don't behave too couple-like yet.

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Lean in for a kiss somewhere in the second half of the date, but only if it's right.

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If all goes well, go on another date.
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