True but they will have got results elsewhere and probably were not invested in you, so it wasn't a big issue for them that you said no...
On the other hand I bet he is not getting anything right now, and clearly, he is hugely invested in you, who are not even sureif you even want to date him. A bad situation to be in.
Whatever though I gave my two cents...whatever you do good luck with it
And just try to chill and enjoy it...if he gets too heavy that's his problem not yours.