unable to cope up with a semi-long term break up

I should start with some back ground. My girlfriend and I were together for 2 years and a little more. There is a 2 year gap between us (me being the older one) and we have both dated here and there before but it is safe so say that within our young lives we were probably each other's, atleast mine first serious romantic relationship and that too in our early 20s. During our first year together she felt the need to explore her sexuality ( her friends had somehow convinced her that if I loved her I would let her find out her identity, that it was nrcessary and that meant having sexual relations with others). I am a quite a monogamous person and as such I was against it. A little after our 1st anniversary and when I was out of station for a month for an internship, she kind of cheated on me ( her, her bisexual friend and that friend's friend, a lesbian got drunk and my gf had sex with the lesbian) she regretted it and I could never truly forgive her for it. I just pushed through since it can't be changed and I loved her. I still do. 3 weeks or so back she got drunk at a club and cheated on me. Again. Confessed to me by herself while crying. I asked for space. I knew I still loved her. This was just a few weeks after our 2nd anniversary. Even so I knew I could never forgive her. She had family problems as well and I couldn't tell her parents and break their hearts so I acted normal and pushed through despite knowing that I won't forgive her and my trust in her had taken a huge blow. The following week she got molested so I put it all aside and decided to focus on taking care of her. A week(last week) later she told me that she was traumatized, could trust or feel anything for anyone, not even love towards me and that she needed space to heal. I did oblige, just asking now and then how she is feeling. By the 2nd night she, stopped talking to me and last friday when I called she was at some guy's place i didn't know with her friends and I was concerned but she told me that i am not her partner at that moment and as such I should stop being this way. I was hurt. That night I told her that due to her actions I am insecure and if she were to do something physical with someone despite promising that she would come back to me I wouldn't be able to take it and would break up with her as I would feel being taken for granted and I felt I have been disrespected enough. Also she may take her time to heal but I can't stay around for an infinite amount of time while she stays with no strings attached as it wrecked me with anxiety. We broke up then as she would not agree with me... It felt horrible. The following day I spent it crying and it was last friday. On friday night she told me that she did go ahead and makeout with 2 other guys in that 3,4 day period and... I just. I love her I still do. I spent every minute on her, lost friends and now... I am alone. I hate it that I love her so much that a part of me still feels like going back but I know it won't be right. There is this void I feel. Everything I did... I had her to speak to and now... I am alone. No one to share my moments with. The memories crash on me and I break down at random moments and mixed with this lonliness... I am tired and ao drained... I don't know what to do. I love her. I don't hate her and don't want to. I just don't know how to stop feeling so horrible all the time. I can't connect with anyonw because for 2 straight years it was just me and her and I sacrificed everything for her. I feel so lost... and alone.