The speaker is trying to reassure a partner who seems doubtful or jealous. He insists that she is the only person he loves and asks her to trust him. The repeated question, โWould I lie to you?โ, makes the song sound both confident and pleading: he declares his honesty, but the need to keep proving it suggests that trust is not yet settled.
Several images express this desire to be believed. Asking her to โlook into my eyesโ presents eye contact as visible evidence of sincerity. The โbedroom doorโ suggests that he has kept his feelings private, but now they are exposed. His diary, with the partner โin every line,โ is a metaphor for how fully she occupies his thoughts; it does not necessarily mean he literally keeps a diary.
The lyrics can be heard as a straightforward love promise: he wants to stay with her and says he would not give his love away. At the same time, โeverybody wants to know the truthโ and โjealous minds are never satisfiedโ hint at pressure or suspicion around the relationship. The song does not explain why she doubts him, or whether his assurances are enough. Its emotional center is the gap between declaring love and being trusted.