Should we stop dating and stay friends?

I really like this guy but I don't know how to tell him. We've dated a couple of times and it never seems to work out (mostly down to me). He's really sweet and kind and it's never his fault that we break up, I think we just lose the spark.

We've become friends again and I don't know whether to risk the friendship for a chance at something more.

We kind of have a cycle, we date, we break up, we have a couple of awkward weeks of avoiding each other, we become friends again and then we date again. I don't know whether to stop the cycle now and just say 'if it hasn't worked out before what's so different about this