The guy I like vs. my mom

So I have liked the same guy since 6th grade. When I told him I liked him back then he totally crushed me and blocked me on all social media and everything. I still had a major crush but it wasn’t the same. I ended up dating other guys. I ended up moving schools a few years later and I figured that would be the end of it. Bye bye boy and I would never see him again and move on. My freshmen year that’s exactly what happened. I almost forgot who he was. However, now I’m in 10th grade and he ended up moving to the same school as me. At first we wouldn’t even look at eachother. Then we started sitting with eachother in class and talking a little bit. All of a sudden we were best friends and we talk all the time and hang out and everything and everyone thinks we would make the greatest couple and I think so too and I really really like spending time with him. I obviously still like him. Well a few weeks ago he told me he likes me.. in my head I’m like WELL ABOUT DAMN TIME ONLY TOOK YOU 3 FREAKING YEARS. But when I told my mom that.. she stopped letting me hang out with him and she doesn’t want me in the phone with him all the time anymore. She’s worried because he crushed my little heart when I was in middle school. Now that he likes me she’s worried that he only likes me because I’m more “experienced” and she doesn’t want me to go get my heart broken again. BUT I think he is a totally different guy and he is really sweet and he’s awesome and he thinks I’m special and he makes me really really really happy.. I don’t know how to tell my mom hat he’s changed and that he won’t hurt me.. help..