advice please galsss

im still young, 23. How the hell do I go on with my life after a 7 year relationship, there was no feelings there anymore for both of us, we were over long before we admitted it to ourselves. we had gone through so much together and basically just became friends that shared a bed occasionally, in the end were just living two separate lives both wanting and doing different things. so we agreed to go separate ways about 2 months ago. it was the best decision we have both made. but I just feel so bad even thinking about moving on, or just having fun ya know? we are 100% done for sure, I still care for him as a person obviously, but I feel like I'm betraying him? I'm not saying I want to be in a relationship with someone right this second but what can I even do to start getting on with my life ?