Just tell the friends that after a talk with your boyfriend you are wishing to continue the relationship with him, explain he took responsiblity for his actions apologized and after talking you decided it was worth continuing and trying together. If they can accept you being happy and arent willing to try and get past this one incident then they arent good friends and they would have found another reason to bail on you eventually. If you see a serious future with this man then i say try with him, focus on what makes you happy and if that is him them focus on that. At the end of the day you being happy is the most important thing, dont let others bring you down because they are currently miserable