I&#x27;d say &quot;Been nice talking to you.  I&#x27;ll keep you in mind in case I get the killer idea.  I&#x27;d appreciate it if you do the same for me.&quot;  And then I&#x27;d move on.<p>If and when I get a great idea, I&#x27;d give him a call and see if he&#x27;s still a good fit, and if he&#x27;s available.  If he called me, I&#x27;d see if I was interested, available, and thought he had a good idea.<p>And if neither one ever happens, I wouldn&#x27;t stress about it.