You don't necessarily have to hold yourself to a promise made by "4 years ago you". Be kind to "now you" and leave your options open. That might be retirement or it might be reducing workloads or changing jobs. The only criteria is that you do what you think is right for you at the time: no-one else can tell you what you should or shouldn't be doing.
Money-wise, you seem to have 2.22m euros (1.35m cash, 570k investments, 300k equity) to see you through the next 12 years. At 62 you move to having additional pensions of 62k per annum, and at 67 you move to having pensions of 72k per annum plus an additional lump sum of 900k.
You could probably live off this without bothering with investing the cash. Alternatively, you could invest your 2.22m and with a (conservative) 3% safe withdrawal rate would have an immediate income of 66k per annum with the capital probably increasing year on year.
Your fear of investing and your fear of seeing your funds dwindle are completely incompatible, result: paralysis. Your fear of investing is probably part rational (plenty of people would love to live off taking some -or all- of your money in return for investing it) and part irrational (cash is a losing proposition because of inflation and economic growth, if stock markets crash to the extent that index tracking funds become worthless and produce no income, the cash you hold will be just as useless as your invested funds). But you are going to have to take rational actions on the rational fears, and overcome the irrational ones, if you don't want to spend down your accumulated capital in retirement.