Maybe you can ask yourself if you feel comfortable with having been part of things becoming as they are.Ask yourself whether you feel this situation is the way you want to live your life.If it could be different ,,,,from the start what would you change?Maybe the relationship has taken too many wrong turns in the big picture,to salvage.It only complicates things to conduct relationships with more than one person intimately,jmo.Unless people are clear;from the start,that this is the way it will be.Sounds like there is hurt,and miscommunication.Whether one has been only snuggly and kissing and the other is pushing it into the wall...(lol)...makes no dif.The thing is both of you chose to be non committal and these are the results of the actions.I am no one to judge.So,I feel absolutely no judgement...but you need to examine what you really want,and find it.It may not be with this person,idk.I guess that time is of the essence as far as focusing on what you intend to do when and if she does decide to pursue you again.Hmmm....the impact on my studies,the stress on my mind and body....find your values and priorities according to your best interest...and stick to what you decide even if it isn't easy.Relationships can be intensely complicated...to be sure.