Is it okay? For example you are talking to someone sad, and you want him to wear a happy mask, you'd say
- If you wear this mask, you will seem like you're happy, but you're crying inside.
- If you wear this mask, it will silently kill you, but you'll still choose to hide.
In 1, I expect that he will seem like happy but will still be crying under the mask.
In 2, I expect that the mask will silently kill him eventually figuratively, but I also expect that he'll still choose to hide.
Are these grammatically correct? And did I punctuate them correctly? With commas before buts.