Sex before marriage

Okay so I’m 17 and my boyfriend is 17 and we have been together for a year and a few weeks. We haven’t had sex yet but we keep going back and forth between doing it or not. We have talk about getting condoms but we never do because it will make us want to do it even more. We both have Christian faiths and know that premarital sex is not good. When we are making out or get caught in the moment we want to have sex but we do not because of the lack of protection and it’s like God is pulling us back from it. We wanna do it in a way but we know we shouldn’t and that it’s no the right thing to do. I just feel like God is telling us that sex is not going to help our relationship grow and it’s not healthy for a Christian relationship. I just need reassurance, advice, or whatever you have to say.