You can either lose yourself in the music you're playing and your love for it or fake it with mechanical control of notes and bends and vibrato, but then you might lose interest. It can be done however, you can learn to control the volume of how you strum the note you can affect the tone of the note, pressing down hard when fretting, picking harder, which ever, personally i prefer letting go and just playing wtih all the emotion of the song, if the music you're playing with has no emotion you can't expect to feel that you should. Humans are not perfect, don't play perfectly, play to the best of your ability or half of it whichever you feel is most appropriate at the time. Play for fun. That is all that matters, don't play to get chicks, unless that makes you play better, if that empowers you to play for their emotions then yours will show through. Eh i am rambling...