I've been seeing this guy for almost 3 months and I've just come to the realisation that I really really like and want him.

I'm not used to these emotions as I've never really dated anyone whose been able to make me feel vulnerable and loved. He keeps hinting at a relationship and I've never really responded and now I want to tell him I want before he leaves to go to Spain in three weeks as I won't be avle to see him again until the end of January.

How do I approach this topic?