Feel like I’m 90% there, but facing a huge barrier

After just over a month of a breakup as the one who was let go because of circumstances and then going complete no contact (with the exception of her reaching out recently and me not responding cause I know nothing has changed in that short period of time and it would just end the same way), I feel like I’m ready to let go but I keep having these weird thoughts of “what if she does honestly want to come back and I won’t know until after I’m over her” accompanied with a fear of never speaking to her again are stopping me from just letting it happen. Anyone else experiencing something similar?