How can I get over from being love sick.. it's very depressing?

[Gurt]

I have absolutely no idea how to fix it.. it's hurting me to the point where I cant stop thinking about the girl I like a lot. I been constantly listening to music mostly about love.. even right now I am. I haven't been eating as much as I used to and that's very unhealthy for my body. Sometimes throughout the day I might shake.. I thought it was because it was cold in my house, but I put a sweatshirt on and still was shaking. I tried to keep myself busy, but I just cannot stop thinking of her. What should I do.. still keep thinking about her and hopefully it will go away? Also my heart feels very warm at the moment and I don't know if the cause of it is because of being love sick. I am also the type of guy who likes to play video games a lot, but ever since I started talking to the girl I really like and I have completely kept my limits from gaming because of it. Is being love sick over the girl I like a good thing? Any help is appreciated.. thanks!