The singer is speaking to a loved one who has become distant and treats her badly. She still misses and needs this person, and asks them to return rather than end the relationship. The feeling moves between hurt and loneliness on one hand, and hope for closeness and reconciliation on the other.
Several phrases show how strongly she feels. โBreak my heartโ means to cause deep emotional pain, not physical injury. โMake upโ means to become friendly again after an argument or separation; here, the singer pairs it with kissing, suggesting a return to intimacy. โLoneliness has got the best of meโ means that being alone feels overwhelming and is affecting her deeply.
The lyrics present love as powerful but unequal: the singer says she has been true and loved only this person, yet she is left wondering what she did wrong. Her repeated pleas could suggest that she believes the relationship can still be repaired, but they also reveal how dependent and vulnerable she feels. We do not learn why the other person is away or whether they will return, so the song leaves that outcome unresolved.