This statement portrays a sense of constant preoccupation with someone, regardless of the speaker's circumstances. "I Think Of You Only Twice A Day" humorously suggests that the person addressed is on the speaker's mind even when they try not to think about them.
The phrase "When I Am Alone And When I Am With Someone Else" signifies that the person occupies the speaker's thoughts both in solitude and in the presence of others, highlighting the persistent nature of their feelings.
In essence, this quote playfully conveys the idea that the person addressed is a constant presence in the speaker's thoughts, regardless of the situation, underlining the depth of their attachment and affection.