My girlfriend doesnt know if she want to be with me or not?

ok me and my girlfriend have been together for almost a year! it started off great. she used to crave for my attention all the time and i didnt really give it to her. we went through a rough patch of argueing all the time and i raised my hand to her! after that happened things completely changed i fell in love with her way too much i became needy and wanted her to cuddle me and kiss me all the time and it drove her further and further away from me. i could see that there was something on her mind and then last week she told me that she had cheated on me with one of my best friends and they had slept together more than once. i love her that much that i told her i could forgive her and make things work if she wanted to and she agreed but after 2 days i could see she was unhappy so i asked her what is up with you? and she said she doesnt know if she came be with me or not she says she still loves me but a lot has happened and just cant make her mind up! she said that if she wanted it to be over for good then she would just tell me instead of keeping me holding on. so i do know that she is unsure but nothing has changed in the last 5 days she is still the same. i was a bit full on to start with texting her all the time and ringing but that didnt work so i tried playing it cool and didnt bother talking to her for a good few hours and then shes texting me all the time but as soon as i start again she gets angry. i cant walk away from her so at the end of the day im gonna wait it out. i need some help desperately. does it sound like shes going to leave me or get back with me? does she just need some time to herself? what should i do? any help will be much appreciated as im so heartbroken at the moment. thanks xx