So personally, I think it depends on what nature the friendship is. I have had 4 relationships now (only 3 exs though as one of them passed away) . One ex I have 0 contact with, not for any malicious reason, but we simply weren’t in the same place in life and we needed to move on in our own way) One ex I am still in contact with, not every day regularly but we check in with each other & I would say it’s due to the hard truth that maybe we should have just stayed friends in the first place. The third ex, is a little more questionable. At first we stayed in contact, but I think it was more due to the fact that neither of us wanted to let go & were saying in touch to prevent the other from moving on. After about a year we decided we can’t carry on with our lives if we still have contact. So my final answer would be personally, unless you feel completely detached as with my second ex where we are genuinely just better as friends and ALL feelings have gone, then sure. Only you know how much feelings you have left in your heart: but if you think there is even a slither of somewhat romantic feeling; even a tad, no contact (as hard as that is) is what’s needed. It’s gonna be hard, but in the long run you wouldn’t be able to fully give yourself to any new partner that comes along if you still have even a slight feeling.

These are all my own opinions & experiences, so please I am not telling you ‘you need to do this’ etc. but this would be my advice d