My girlfriend thinks I lie about EVERYTHING. Anything I can do to show her I'm not?

snowman1236
my girlfriend constantly thinks I lie. every little thing I tell her she dosnt believe. I don't kno wut to do that will show her I'm not lying, except just give her my word. so is there anything I can do to show her that I'm being honest with her?
My girlfriend thinks I lie about EVERYTHING. Anything I can do to show her I'm not?
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