From that point things started getting complicated. In grammar in use book, the bold part has been considered as correct answer. To get is the normal form and would be best for everyday use.
Ferry Schedules & Maps MBTA
From that point things started to get complicated. He did not succeed in getting the job though he tried his level best. Regarding the to getting forms, i.
In your exact context, the real underlying implication is probably more don't go too fast for your dating partner rather than.for.
From that point things started to. So, i like getting/ to get to the station in plenty of time. However book titles are allowed artistic license.