Forbidden Reunion

Suppose you had a good childhood friend when you were eight. He/She was to move out as his/her family is is transferring to another house. Broken by the sudden separation, both of you said bad things about each other on the last day, the day of separation. The guild and regret strike you both after it has been done. It's too much to face each other again. Well, that's what happened for the past ten years until you went to live in a rented house, far from your home for studies. The thing is, a new house mate moves in. To your surprise, he/she is your old childhood friend. Twist - both of you pretend that both of you are meeting for the first time and have not known each other as the regret is too great to face each other. Note - This scenario gives the option of both male and female childhood friends. The theme is living together, hiding your guild and regrets.