It is very hot in summer. What should I say about caring about my boyfriend?

Just say: summer is really hot ... but autumn will come soon ... now let's go swimming. ...

You can also say: BF XXX, don't you like being bored in summer? Now you don't have to be bored. Because of me, I will be your fan in summer and help you get rid of the boring heat. Leave this task to me in summer. Hee hee, what do you say?