I need help!!

Hello ladies, I am looking for some advice. So recently I messaged one of my guy friends and we've been flirting on and off but have never really been serious. We started sending each other pictures on Snapchat, not nudes, but sexual photos and the only time I really see him is at church. He said he wanted to start doing things at church and I told him I wouldn't have sex with him cause I am waiting till marriage so he wants to do other things. I really like him and have for a long time and a while ago we talked and were being flirty but not in a sexual way and he told me I was beautiful. I guess I'm either asking should I end things before they start or give it a try and have some fun? I also want, if this happens, to actually mean something to him not just a way to help him when he gets horny. Btw we are both 17. 😅😬