Wring For My Old Laptop

I sold my laptop 4 days ago and (. I) have been so sad. You know, my father bought it for (to) me when I was in the second year (years) at (the) University. It has been (attached) with me since that day until now. In my memory, there were many nights when I stayed up late to finish the essay or just chat with (talk to) my friends. ( about anything.) Even, if I didn't sleep all night, the laptop remained on my table, switched on. (still was turned on without doing anything, only was on my table.)

The (Its) graphics card became faulty six months ago but couldn’t be fixed. (as error and it was replaced one times. This error was happened 6 months ago and I couldn't fixed it.) It was a difficult decision to sell/replace (decide to buy) the laptop that had been (stayed) with me for 7 years. (But finally, it was done!)

Anything that forms part of (lives in) our memories (is) always lingers in (deep inside) our heart.

P/S: Please pay your attention to my entry and correct for me. Thank you so much for your look. Have a nice day, everyone.

Good and  interesting essay. The title should be capitalised. Your first two sentences can be easily combined. Some of your sentences can be shortened and I have suggested a few different phrases to make it read more naturally. 

Yes, we do form emotional attachments, especially with phones and computers, and I guess it's predominantly because they have electronic brains, which we can identify with.