The 3 things to improve "feeling" within your playing

1.Attack:how hard or soft you hit the notes
2.vibrato/bend:wiggle that string with your heart!
3.approach:you might sound good,but presentation counts too

also remember NOT to play your songs/music with an "exercise" state of mind!!!Learning techniques/ways to express yourself accuratley is essential "practice" as a guitarist but you must remember that the guitar is meant as an outlet for youself to convey feelings....imo
#3 seems wierd but have you ever seen that awsome guitarist heroe of yours play your favorite song and say to yourself "i can play that"...but know that somthings missing?You might have things note for note whether it be your music or somone elses but "presenting" your music "AS ART" or an "artform" is important.Stay loose,relax,and use your skill to "speak"