How to cut ties with a guy

Can someone give me some advice on how to cut ties with this guy, because u think he's trying to string me along in case he can't get his ex back, and I don't like to just disappear on people but I feel like if I call him out he'll just freak out on me and act all offended if I said anything, and I still have major feelings for him and I don't have to see him around other then at my bible study which I haven't gone to regularly very lately because the day just doesn't work for me (I hate that, but I just can't make it on Thursday nights) so I don't really see him, but we both talk still and he says he just needs to work through some stuff so we can be together but then I saw him talking about his ex and about him having talked to her parents and them still hating him and forbidding it so like I just don't know how to get away and stop having feelings for him without upsetting him too much