partner leaving after cancer


so I finished treatment a year ago and have been on and off with health since but now after my last surgery (gallbladder removal) I’m in a much better place just fixed my car and I’m applying for jobs and I’m really keen to get back into life I’ve been seeing friends more etc. my partner was together through the whole treatment and everything after but I’ve had problems with intimacy and being close I’ve been so cold and distant for so long and I don’t know how to change that. my partner has now spoken to me and we’ve decided to go on a break I suppose see what happens we still live together but yeah I just feel so lost