Be willing to use a few more words rather than to buy economy at the price of grammatical correctness. Combine these thoughts into a single sentence. Married people share memories. Married people share happiness. Married people grow together as one.
Married people share memories and happiness and grow together as one.
Married people share memories and happiness, growing together as one. Sharing memories and happiness, married people grow together as one. By sharing memories and happiness, married people grow together as one. Combine these ideas. If you write a list, check your sentence by reading each branch with the stem.