‎Since I met you I have been very enjoyable every day. Thank you for letting me understand what gratitude is.
Now, I have an unshakeable faith in the goodness of others and believe that anger and depression can be eliminated by love and hope！

It sounds natural？

Question

‎Since I met you I have been very enjoyable every day. Thank you for letting me understand what gratitude is.
Now, I have an unshakeable faith in the goodness of others and believe that anger and depression can be eliminated by love and hope！

It sounds natural？

Answer

The first sentence doesn't mean what you intend it to. I would recommend:

Since I met you, every day has been enjoyable.

OR

Since I met you, I've enjoyed every day.

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