Lastone123, do you and your boyfriend have similar attitudes to money?
On the face of it seems like you might be the earn a lot and put some aside for saving type - you have 2 jobs and rich parents.
Whilst he might be the spend it as quick or qucker than he gets it type - he's clubbing a lot on a student income.
So, even if he does cheat on you, and you break up because of it, it may be for the best in the long term, as compatible philosophies on money are essential to a happy marriage.
As for telling him what you think of his clubbing without coming over as clingy or controlling - that may be a mission impossible. Reverse psychology may be the least worst option. For example, telling him that you want him to enjoy himslef whilst he's still a student, and that if he cheated on you, you'd probably understand and would be happy for him whilst also at the same time being upset for you, and that you'd prefer it if he told you about it up front for practical STI precautions - condom sex only for 3 months followed by a full blood test for him. If he then says that you don't love him if you're willing to share, reply by saying on the contrary you love him too much and can see the world through his eyes. Also add that you'd tell him straight away if it looked like you might cheat on him, before any cheating happened - not that you're planning on doing it anyway.
At the end of the day, cheaters gonna cheat, regardless of what you say or do.
Whilst faithful types gonna stay faithful regardless of what you say or do.