Thanks for the tip.
But what do I do if I only see them randomly and for some seconds...for instance, this week I saw one of the guy and he smiled and I smiled back and he said hello and I said hi and we both kept walking

it happened twice in one week back to back, so
how can I step it up?
The other guy...is at the gym...I kinda nailed down the days he is there too...and we randomly cross each other's path at the gym because he is always playing ball...the last time we cross I smiled..but I must have looked like an idiot because he barely smiled back...
And I know that he likes me for a fact because my workout partner told me that he was interested but he felt like he couldn't walk up to me cause I am intimidating...and by this I mean that when I go to the gym is to work out...I don't socialize or smile straight up
so what do I do?