I buildt my dream house! I built my dream house!

I buildt my dream house! I built my dream house!

Past tense needed here.

I buildt my dream house! I built my dream house!

I buildt my dream house! I built my dream house!

I just rearranged the furniture in my house. I just rearranged the furniture in my house.

I just rearranged the furniture in my house. I just rearranged the furniture in my house.

Past tense needed.

But that makes a huge difference. But that makes a huge difference.

But that makde a huge difference. But that made a huge difference.

Corrected for past tense.

I never realize my room can looks “ so cool”. I never realize my room can look so cool

It sounds more natural this way but cool alone is also okay

I never realized my room can looks “ "cool”." I never realized my room can look "cool."

- Corrected for tense. We always put "realize" in the past tense when using the phrase, "I never realized..." - As for the period within the quotation marks, I found this said about it: "In American English, commas and periods should be placed within the quotation marks as long as they do not change the meaning of the quotation." Perhaps it is different in British English, but I'm not sure.

Furthermore, I didn’t spend extra money to buyon new items for this house. Furthermore, I didn’t spend extra money on new items for this house.

In fact I will going to buybought some furniture but only second hands. In fact I bought some furniture but only second hand.

The entire time you were using a past tense so i assumed that you already bought the furniture instead of going to be it

In fact, I willam going to buy some furniture, but only second hands. In fact, I am going to buy some furniture, but only secondhand.

- Comma after the phrase "in fact" at the beginning of the sentence. - I don't know if you have already bought the furniture, but if you are still planning to buy it, use: "I am going to..." - "Secondhand" is one word and an adjective, so it can't be plural.

Anyway, now I want to invite (my) friends to come to my house. Anyway, now I want to invite (my) friends to come to my house.

You can use my or some

Anyway, now I want to invite friends to come to my house. Anyway, now I want to invite friends to come to my house.

- You must invite people TO do something. Ex: "I invited her to dance with me." - Also, an alternative: "Anyway, now I want to invite friends over." It is shorter and simpler. Either way is correct, of course.

I want to impress them, I amand be a cool friend! I want to impress them, and be a cool friend!

I want to impress them,. I am a cool friend! I want to impress them. I am a cool friend!

Period instead of comma here. Try to avoid "comma splices." I recommend reading about those, if you'd like. These are two separate ideas/sentences, so they cannot have ONLY a comma between them.