I knew it was there Though I tried to hide it But 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 Thinking 'bout you all the time I can't sleep no matter what I do I just keep on thinking '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 Thinking 'bout you all the time I can't sleep no matter what I do I just keep on thinking 'bout you Constantly, you're on my mind Thinking 'bout you all the time I can't sleep no matter what I do I just keep on thinking '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 going through Everytime you walk by I see love in your eye You're on my mind Keep thinkin' about your love I just keep on thinking 'bout you Constantly, you're on my mind Thinking 'bout you all the time I can't sleep no matter what I do I just keep on thinking 'bout you