Today is our important date.We saw useach other over Skype for the first time.And I can never forget what we did wear iwore on this espeacial day.

You don't see "us"- that would be referring to how you refer to both of you together. Rather, one person sees the other person. Using "And" to start a sentence is sometimes frowned upon as informal. The past tense of "wear" is wore.

Today, I can't believe, three years agotogether hasve gone by so quickly./

We are together we love each other with all respect,with mind, and with our heart.

We are together. We respect and love each other with our minds and hearts.

I feel so blessed for having you in my life; very much blessed meeting a man withlike you attribute is not an easy task.

very much blessed is redundant. "attribute" is a bit awkward, and I feel like it would be implied with "like you"

I consider you soothink you are so speacial.

Adding extra os is informal.

God is giving me what's the best for me and the best is what I do get every single day of my life.

I was confused at this part with "what I do get"

You are a gift of" the "best gift".

I don no't want this email to be any longer email.

Thank you for your supporting me in a bad times and in a good times.

Since you mentioned you've been together for 3 years, I made "time" plural for both bad and good.

Thank you for your teaching me Hhow to be patient in life.

how is not a proper noun, it is not capitalized

Thank you for your making me happy every day.

In my turn, I will support you in a bad times and in a good times in turn.

I can't wait for to see you arrive in my counrtry.

I wish our dreams come true.

I want to thank everyone who helps me to write a beautiful letter.

Please, if you have anoyther words or sentencesing else to add, help me.

I think it's already implied that people editing this will add "words or sentences".

Today is our important date.We saw us over Skype for the first time.the anniversary of the first time we saw each other on Skype. And I canhave never forgetotten what we did wear iwore on this espeacial day.

Based on your next sentence, which refers to three years going by, I think you mean this as the anniversary rather than the actual day you saw each other on Skype. My correction is only valid if this interpretation is correct.

Today, I can't believe, three years ago has gonehave gone by so quickly.

We are together and we love each other within all respect,s, with our mind,s and with our hearts.

I wasn't quite sure what the part about respect was supposed to mean. I interpreted it as meaning "in all ways" but possibly you meant "respectfully." But to say "with all respect" does not really work in this context. It's usually what you say before you tell someone something negative. For example: "With all respect, your idea is completely ridiculous."

I feel so blessed for having you in my life; very much blessed, because meeting a man with you attributelike you is not an easy task.

I consider you sooo speacial.

God is giving me thewhat's best for me, and the best is what I doam getting every single day of my life.

You are a gift of" the best" gift.

I don no't want to be a longer emailhis email to get too long.

Thank you for your supporting me in a bathrough good times and in a good timebad.

Thank you for your teaching me Hhow to be patient in life.

Thank you for your making me happy every day.

In my turn, I will support you in a bagood times and in a good timebad.

I can't wait for to see you in my counrtry.

I wishhope our dream comes true.

Please, if you have another words or sentences, help me.