Is He Breaking My Heart or Is He a Different Type of Lover?

I can’t even explain to you how depressed and unhealthy I feel because of one boy. In the morning, I can’t eat and if I do, disgusting stuff will come out both front and back. At lunch, I can’t eat so my friends eat my food. At dinner, I eat so little because of how anxious I am. I am so anxious that I’ve lost weight because I have barely eaten. I get stomach aches and I they won’t go away. This happens when I’m thinking about a guy: my boyfriend. I’ve NEVER EVER felt this way about another guy, and we started out with a great start. Problem is, too many issues hit. He doesn’t show that he loves me, but he really does. He hangs out with other girls and tells me he isn’t in love with them. My boyfriend is a different type of lover, so your answers you give me might not be accurate. Well, today, we were in heaven and then after one of my classes in the afternoon, he sat away from me and by other girls who have a big crush on him. I felt really jealous, and that’s when I couldn’t take it. I was on school duty at the end of the day, and then I caught him and a girl sitting by each other drawing “Pink Pig Flowers”, not knowing what that meant. Crap like this has happened a few times, and I know he is either playing dumb with me, he just doesn’t want to be by me or he doesn’t love me anymore. The girl was twirling her hair and totally flirting. I was on the edge of going in there and dumping him because I can’t take it anymore. I’m more jealous when girls are near my guy, and today, my friend was by me, noticing I was angry. She went into that class, and I saw her talking to him. She came out with him, but I ran away from them. I had a tear trickle down my cheek as I left for school duty at the end of the day, and my heart shattered. Can you give me any help please?