Age ?

My longest relationship was 3 months, my current relationship is about to be 4!!! The reason this is, is because I found how to cope with my abusive ex I need thoughts ! My current man is 21 and I’m 17 he’s talked to my parents before and they’ve been observing him a lot actually! This guy is really responsible and respectful, he knows what he wants in life and he’s a gentleman, I also know what I want to and I’m not about silly games or gossip, I don’t want to grow up so fast either so I’m enjoying my youth, he said he’s going to properly ask them if we can date in person, I overheard my mom talking about him and my sister is his age YIKES ! I really care about him tho so it doesn’t matter to me he also respects me a lot. I need some advice from people who went through the same and things went out well cause I don’t doubt in our relationship at all it’s great !