Opening out!

You don't have to force yourself to be expressive and articulate all of a sudden if it's not really in your nature to be so. I think that showing how you care about others in your own special way will matter more to them. Just be there for them especially when they need you the most. Be there when they need someone to listen to them, lend a helping hand or a shoulder to cry on when they need them, etc. You don't have to be particularly emotional when you're doing these things - your presence matters, and your sincere concern and affection will find a way to manifest itself. I believe you don't need to show your emotions all of the time - what matters more is that you show it at a time when it is especially needed. Say, sympathy for a loved one struggling at loss, or support for someone who deserves to get something they really want. Things like that. I'm quite aloof and reserved myself, at least in person, but I (and my friends and loved ones) have learned to live and love this particular quirk of mine. Hope this helps!