Should I be worried my GF hasn't said "I love you"?

We had some issues about 2 weeks ago, but things are much better now. Coming to think about it, she hasn't said "I love you" in a while. Neither have I, but I've been worried she wouldn't say it back - that would hurt me.

She's a little tense and stressed out at the moment, so I don't really want to ask her.

What's up?
Should I be worried my GF hasn't said "I love you"?
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