Is it normal not to be lively?

I don't know, maybe it all depends on our nature if we are eager to smile, talk and laugh loudly, be cheerful and infect others with our good mood, etc. These aren't frequent moments in my life. Often I drag lazely, have no smile on my face, talk without energy, find nothing to talk about and not much to say for the people I care about including some of them that really need emotional support from me. Also it is fun, that all my life and now, too, I have been cheerful, careless and not too serious about things with the people who don't know me well, like in times when we have some communal activity (e.g.while being with the people I study with), or with friends that don't know all my insides.I noticed that I feel alive while listening to the music I like, then I even want to start dancing. Of course, this is normal, but for me that's almost the only thing keeping me alive. There's some kind of world of myself in the music that I listen to, some things that I dream about, that makes me feel quite good. But usually when I turn it off, everything suddenly goes away and I feel spiritless again. And I have some acitivities like photo shooting, playing music, reading, being outside, travelling etc., but I couldn't say these things have changed something inside me very much. Often I just feel like a shadow. And I'm tired of being like that - speechless, quiet, boring, not capable of showing love for the ones I care. I wonder, do many people feel that way and maybe some of you know what can be done?
P.S. I don't have suicidal thoughts or something like that; I find pleasant and good things in life and I want to live.