Diesel sell after job change?

Moin together, I’m facing the following problem, or I need support in making a decision. At the moment I commute about 70 km per journey every day, or 140 km per day. Since someone drove me back into the car last year, I bought a new car about a year ago, Seat Leon Diesel, EZ 2016 and currently approx. 75,000 km on the speedometer. Now, however, I have a new job from November, and the journey is only 10 km. From time to time I will ride a bike, a However, there will still be some journeys by car – unfortunately poison for the diesel Longer journeys are at least not scheduled regularly. Now I am faced with the decision to continue driving the Seat in the hope that I will not get too many problems due to the short distance. Or already buy a new car again, but this time as a gasoline engine… What are your opinions about it? Thank you!