<Hey she’s cute/hot/pretty/gorgeous/beautiful!>
<I wonder if she’s noticed me…>
<I hope she hasn’t noticed [insert self-conscious quality here]>
Then, depending on confidence levels and familiarity
<I’m gonna ask her out. / I’m gonna see if she likes me, then I’ll ask her out. / I’m going to try to get her to like me, then I’ll ask her out. / There’s no way she’ll ever like me. I’ll look sad and avoid eye contact.>
So basically the same as girls. With more intermittent primal thoughts.