Convince my girlfriend that we need to be together?

I’m just curious how I could convince my girlfriend that we need to be together like we already have made plans and stuff for the future to be together and everything like that and we really want to be together. It’s just a little bit hard for her as she can’t explain it as she probably doesn’t know how I would feel about it and I’ve said to her no matter what happens and no matter how long it takes I will wait for you

Convince my girlfriend that we need to be together?
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