I really like this guy... he's about 15 years older than I am and he plays 'matchmaker' for me, but truth is I like HIM... how do I let him know this? I am 20 and he's 35...

I don’t have too much contact with him, but see him in real life several times a year. I work closely with one of his cousins, though. His cousin suggested him to me twice, but I said nothing because I was afraid of it being really awkward if it didn’t work out. Is the only way to let this guy know that I am interested is to say it outright? And if so, how do I say it? Or do I not say anything being I am the girl and he should be the one to approach me?