Are you sure you want to break up w/ him or are you undecided about that?
Have you gotten physical? Best way to know if there is a spark is to kiss...do something physical...
Either it's there or it's not.
If you're sure it's not, just end it asap bc the longer it goes on, the deeper his feeings are likely to be. Maybe say you see him as more of a friend than as a bf.
3b (with 3c tendencies) on modified CG