Birthday gifts

Tomorrow is my birthday. Maybe someone will ask me "how old you are?" hmm, I will tell them "It's a secret ". (you can say 'one year older than yesterday' :) )
I always remember the special birthday of seven years ago; that day after class, I went together (to avoid saying 'me and' or 'I and') with me and another three roommates went to the market to buy a lot of delicious foods, and i received so many beautiful presents from my classmates.
But after since graduation, we no longer make contact, and I miss them so much. With Because of our working/jobs, we everyone can't meet. I know that some of them have married and have lovely babies, but I am still alone, I envy them, so I wish that the right man will would show up.
Otherwise Next month I will become an auntie. Haha, my family is going to add new members. I have been ready prepared gifts for her or him gifts.
At last Finally then, happy birthday to me!!! (zhu ni shengri kuaile! zhù nǐ shēngrì kuàilè) 祝你 生日快乐

Punctuation: space after fullstop, comma - not before.

Birthday Gifts

Tomorrow is my birthday.  Maybe someone will ask me "how old are you?".  Hmmmm, I will tell them, "It's a secret".

I always remember the my birthday of seven years ago.  That day after class, me and another three roommates went to the market to buy a lot of delicious  ????? and also, I received so many beautiful presents from them my classmates.

But after graduation, we no longer lost contact.  I miss them so much.  Everyone is so busy with work, everyone can't we're unable to meet.  I even knew that some of them have got married and have had lovely babies, but i am still feel alone.  I envy them.  I wish that the right man will show up in my life one day. (What is in purple really completes your thought)

Otherwise On a brighter note, next month i will become an aunt.  Haha!  My family is going to add new members.  I'll have his/her gifts been ready for her or him gifts.

At last, happy birthday to me.

In blue, you must say what was the delicious item you purchased, or bought.  Such as pastries, groceries, cookies, food.  Just some examples.

The correct way to say "me and three roommates" is "three roommates and I".  What you have written is more colloquial.  You will usually hear people speak this way more.  But from a grammar standpoint, "three roommates and I" is the better option.

The word "envy" basically translates to "jealousy".  If that's how you feel, then that's the correct word to use.  If you mean you would like to have what they have but you are not jealous, you can say, "I look up to them".