Breakup is killing me

Where to start. This guy in my life, I met 3 years ago was a stranger...that led to friends, best friends, best friends with benefits, then we just made it official a year after. The only problem is that he is 3 years older than me. So I never told anyone not even my closest friends. I’m 16 now and he’s 19. We never told our parents because well one, our parents are really good friends and two he’s too old for me it’s illegal even. We knew it was wrong but honestly it was just more like best friends. Last night my mom went through my history of calls and texts (she is very over protective) and saw I had been talking to him too much. Oh I forgot to mention she walked in on us ...well me giving head. Just so you know that didn’t go well at all and we were told to only see each other as friends but nobody knew how close we are. Still don’t. Back to last night, my step dad had a talk with me and told me he forbids me to talk to him anymore. My heart broke into so many pieces I didn’t even have the strength to put them back together it just hurts so bad. My step dad told me not to text him but I had to let him know why I wouldn’t respond to any texts or anything like that. So once I told him we are done we said our goodbyes on the phone. Now..I’m struggling on how to deal with this. Although I’m kinda relieved I don’t have to hide anymore because it was wrong. Someone please help...😪