I want to keep seeing him but my dad doesn't like the idea ?

I just turned 21 and I met a 30 year old at work in march and we've been going out ever since March 17th and now that we've put a label on our relationship I told my parents about him and the only problem is he's ten years older than I am and my dad doesn't want me hanging out with him. My dad actually wants to talk to him

My dad thinks I'm naive and that I'm doing all the intiating and that the guy I'm seeing doesn't really like me , My dad doesn't want him around the house and my dad doesn't want him in the house. My dad thinks because of his age that he's trying to use me so now the guy that I'm dating doesn't want to come over anymore or some see me anymore because he feels like

"he's not welcomed over my house" what do I do? I miss him so much and this is the first week that he hasn't came over to see me or anything and I'm having a hard time dealing with this

Tl:DR; the only reason why I told him how my dad felt is because my DAD threatened that if I didn't tell him that he was going to and now I feel like I'm not going to be able to get him back