Do yal think that he really likes me, or is just fooling around ?

so, I'm starting to really like this guy. He texts me alot and has a nickname for me and stuff haha. We sit together at lunch alot, whenever i see him at school hel scream my name and come walk with me like he doesnt care what anyone thinks haha,(im white and hes like a funny populear african american), he always tells everyone im hsi boo lol, he always tells me he loves me, and yesterday walkin to the buses we were holding hands, and one day at lunch i asked my friend to walk with me, but he said il walk with u and so we did. another thing is like at lunch, and wel be sitting togther and he touched my legso i turned, and he was like i really love u. but then like a minute later he was like will u marry me ? so i mean i never know when hes seriosu lol. and just stuff like that but i mean hes one of those realllllly funny people, so i never know when hes jokingaround and stuff, so what do u think ? oh and weere both in 8th grade.