Questions about example sentences with, and the definition and usage of "Junghwan"

A: × met you two years ago is the best thing that happened in my life.
✓ meeting you two years ago is the best thing that has happened in my life.

× thank you for always working hard, eventhough it struggles you a lot.
✓ thank you for always working hard, even though it burdens you a lot.

× you’re amazing, and words can’t ever be enough to express how much i love and proud of you.
✓ you’re amazing, and words can’t ever be enough to express how much i love and am proud of you.

× you’re loved by many people and i hope your days will always filled by happiness.
✓ you’re loved by many people and i hope your days will always be filled by happiness.

The first letter of sentences should be capitalized, as should "I". However leaving it the way it is doesn't affect comprehension at all and might have been a stylistic choice.