I knew it was there Though I tried to hide it The feeling just kept on shining through Haven't known you that long So I try to deny it But the feeling was much, too much, too strong Could this be love Deep down inside Tearing me apart I feel it in my heart Constantly, you're on my mind Thinkin' 'bout you all the time I can't sleep no matter what I do I just keep on thinkin' 'bout you Why do I feel this way When I know you have someone That you're seeing each and every day Should I play this game Of just being your friend When I know that's not where I want it to end How could this be wrong When the feeling's so strong Tearing me apart I feel it in my heart Constantly, you're on my mind Thinkin' 'bout you all the time I can't sleep no matter what I do I just keep on thinkin' 'bout you Constantly, you're on my mind Thinkin' 'bout you all the time I can't sleep no matter what I do I just keep on thinkin' 'bout you No, I don't want to start no trouble Between you and I and your lover But I must tell you what I'm goin' through Every time you walk by I see love in your eyes Constantly, you're on my mind Thinkin' 'bout you all the time I can't sleep no matter what I do I just keep on thinkin' 'bout you Constantly, you're on my mind Thinkin' 'bout you all the time I can't sleep no matter what I do I just keep on thinkin' 'bout you Constantly, you're on my mind You, I can't sleep, no You're always on my mind All the time I keep on thinkin' 'bout your love Caress me baby