He said: "No, I don't think so. This has been an ongoing question. We have to keep our ambitions high, hold on to our best players.
"For us to make it better in the future we have to hold on to the best. Today [Sunday] there was another great moment of individual brilliance although the squad in the second half was very, very strong, pushing for a winner."
Villas-Boas felt it might have been a different story if Spurs had been awarded a penalty in the 21st minute when Bale went to ground inside the box under a challenge from Sebastian Larsson.
Instead of winning a spot-kick though, Bale was once again booked for diving.
Villas-Boas said: "It's very, very disappointing because a penalty doesn't only change the running of this game but changes the running of the other game (Arsenal match) too."
Despite missing out on a top-four finish, Spurs finished with a 72-point haul, which was a club record in the Premier League era.
Looking back on the season as a whole, Villas-Boas said: "I think it was very good, obviously to manage so many points and not make it means the level has come up and serves as a reference for next season.
"We did better than last season in terms of points but not in terms of qualification and means that others have pushed on a level and next year we have to look at this year's reference and improve our level once more.
"So it's a good lesson to take into next season, (although) it's a pity we didn't get in there this year as it would normally be enough to qualify."
The Portuguese remains optimistic they can push on next season, saying: ""Yeah I think so, we've pushed two clubs who normally should be going for titles and we're not far away from them so this shows how good our season was. We want to be in their position in the future."