We’ve been friends from last 6-7 months and we were pretty close. But one day I was very restless and I unintentionally yelled at him very strongly even though he was trying to help me. I hurt his feeling really bad. I later apologized to him about it and he said OK. But from then we haven’t been that close and i am not able to hold a proper conversation with him. He either ignores me completely or answers me in such a way that the conversation won’t go on. He is one of the only friends I have and he is also my roommate which has made things very awkward and hard for me. What can i do so that I can atleast mend my relationship with him a little bit.