break up advice

my ex and I have been broken up for a week and I still feel the same about it as I did a week ago..we weren't together long, but we had such a strong connection that it felt like we were..she was my best friend, and when she broke up with me I feel like I lost that part of her..it's hard not to think about her considering that we go to the same college and that she still keeps up with what I post on social media..I wanna reach out to her, but I have that fear of being rejected since that's what happened the day we broke up..I keep telling myself that if she's really for me, then we will find our way back to each other..but then a

part of me is scared that we won't and letting go is easier said than done..does anyone have any advice to help the process???