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Hello and thank you for your questions. I can definitely understand why you want to avoid this woman because of your history and because of the emotional hurt you feel, but with that being said avoiding her also isolates you away from your friends and that can break the connection/relationships with these friends as well. It would be best for you to face this woman, but instead just focus on being with your friends and not focus on her at all. I know it will be hard to move forward from this woman and you may do so if you avoid her and not have contact with her, but in doing so you may lose your friends too and that will not be good for you. So instead try to reestablish yourself with your friends, and be cordial and platonic with her, but not that close and also think about exploring romantic relationships outside of the group. You do not have to find someone that is going to be just like her or someone that will be a good relationship partner right away, instead focus on dating as something fun and to get to know others outside of your group. This will help you to move forward from this woman, but ultimately I would highly recommend reestablishing your relationship with your group of friends as that will be in your best interest.
I cannot tell you if it is worth it or not as the value of their friendship is totally up to you. If you feel that their friendship is not that valuable than you may be better off not trying to re-engage them, but if you want to reestablish that friendship with them and be part of that group to which your roommate belongs than going there would be good. It will be awkward at first and you will feel somewhat self-conscious, but eventually you will reintegrate back into the group as you only made a mistake by avoiding them and they will accept that. Try to have your roommate be a segway for you back in this group as that will be helpful to make it a smoother transition. Only time will help you to get over this woman and continuing to do other activities and possibly see other romantic partners will help.
I hope this answers your questions and gives you some guidance on this issue. Please let me know if you have any questions or concerns as I am happy to assist and support you regarding this issue.
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