In the past, if my interest was that keen, I just asked the person out on a date, and as of date, I was refused each time.
Hey, I don’t think I want to be married to someone who doesn’t think its ok to spend time with someone to give them a chance to get to know you…
So, works out.
I would say, give him some hints, spend time with him, and then if you feel like you’ve developed some rapport and he will respond maturely (whether he says yes or no), then broach the topic openly. What’s the worse he’s going to say? Not interested? Fine, cope with it and move onto next guy.