Dreams about relationships, trust, and infidelity often reflect deeper feelings and concerns you may have in your waking life. In your dream, the recurring theme of checking a phone and discovering messages may symbolize your anxieties or insecurities regarding trust and communication with your partner.

The first part of your dream, where you see messages but are told it's nothing, could indicate a fear of being kept in the dark or a lack of transparency in your relationship. The progression to discovering that the messages are from someone else's girlfriend suggests a feeling of betrayal or fear of being betrayed.

Your partner's unenthusiastic responses and slight smile might represent feelings of frustration or helplessness in the situation, as if you are not being taken seriously in your concerns. This could signify a desire for more openness and honesty in your relationship.

Since this dream has repeated elements, it may be helpful to explore your feelings and thoughts about trust and communication with your partner in real life. Consider discussing any concerns openly to foster a healthy dialogue, which may help alleviate some of the anxiety reflected in your dreams.