I suspect that a smart guy like you can figure out ways to communicate regarding this issue in ways that don't come off as clingy. The fact that you are worried about the possibility of "clingy" is some evidence that you aren't at unusual risk of coming off that way (unless there are additional facts in your personal history that suggest otherwise).

In short, something that you come up with after actually spending time (> 5 min) thinking about it is likely to be worth the effort of communicating.