I'd rather keep the relationship strictly businesslike.
a very businesslike manner
• an attempt to run the department in a businesslike way
• Wearing a suit makes me feel more businesslike.
* * *
The meetings were very businesslike.
»She had a brisk and businesslike manner.
We work in a casual yet businesslike environment.
»To design a simple, professional letterhead, pick an attractive, businesslike font and use it to center your name and address at the top.
1) деловой, деловитый, практичный
2) точный, собранный; исполнительный, аккуратный