How can I ask a guy to facetime without seeming creepy?

Anonymous
There is this guy, who is really interesting but I'm not crushing on him because it won't make sense as we're pen friends so we might never meet. But anyways after a few days of texting, he asked me to facetime and we did. Later he suggested to do it again the following week but we both got busy so we didn't and said we will postpone it but we never decided on a specific time. We kept texting regularly though. Except that in the past days he has been slow on replying to my texts. Like one time he took two days to reply and I replied later at the same day and now another two days had passed and he still didn't reply to my text. (We practically text normal things and questions to get to know each other) I am still interested to know him and he seems really friendly and when we're texting he asks questions about me and is willing to always even ramble in voice messages and things were going pretty well. I want to facetime again but I don't know if asking him will seem creepy or clingy.
How can I ask a guy to facetime without seeming creepy?
5 Opinion