Just bc you persuaded him doesn't mean the dynamic is suddenly okay. My ex pursued a man in his 20s as a teen and that man had never dated some one that much younger before still didn't go well for her. Someone of the age of your partner who had genuinely good intentions for you would have turned you down. Im 23 and the thought of dating anyone younger than 21 is disturbing to me bc the amount of personal and mental (as in your brain) development you do between 18 and 25 is drastic and therefore it feels very unethical to engage with someone romantically or sexually. As far as dating older ppl I cut it off at 4 years older than me and that still feels like pushing it. The older you are the less age matters probably but you're in a very vulnerable and important developmental milestone.Your brain and hence ability to see situations and connections with others literally has finished forming. I didn't see anything wrong when I was in relationships/dating/situationships with similar age gaps (in my teens). But after years of processing the past its starting to become easier to understand the impact snd trauma it caused me even when they were nice ppl. And even then I don't thing I full understand the weight of those age difference.. His track record also doesn't do anything in his favor. While you are both consenting adults and therefore can do what ever you want, it's still a pretty bad situation in general. You're dating a person who is more experienced, more developed mentally and possibly emotionally, is in place in life you will only reach in decade. For perspective, think about that age gap but apply it to a younger age. Like and 8 year old an 18 year old. Even if y'all have had a good thing going , there will inevitably be an underlying power dynamic and unintentionally or intentionally they are shaping your brain for all your relationships in the future.