That exactly isn't true. Contrary to the popular narrative, declassified documents from that era show that Pakistan actually wanted better relations with Russia (which was more interested in developing relations with Socialist India) and it was actually due to "cold" Russian response that Pakistan chose to join the US camp instead. Russians did invite Pakistani PM to visit Moscow but later didn't respond to Pakistani official telegrams sent to 'confirm' the invitation's acceptance.It is history repeating itself. Right after Pakistan became independent Russia invited Pakistan. Pakistan refused and chose America. Remember Liaquat Ali Khan? We all know what happened after becoming a lackey of the USA.
Today Russia is again extending an olive branch. What will Pakistan do? Why is it that we always need invitations from regional countries? We are always so eager and quick to make extra effort to reach out to USA.