Boyfriend advice?

Okay so I need some help, I'm 18 and my boyfriend is 28! My parents don't care they just hope he treats me right but my problem is my family members (aunts, uncle's & cousins.. they think they should have an opinion on who I date and associate myself with I've always liked older guys any advice to tell them to leave me alone? I like him a lot and don't want them to ruin this for me plus I'm still a virgin and he's willing to wait until marriage! How is he not perfect?