Some things you said in your post like "...this guy I just met a few weeks ago..." and "...I am only 20..." has me concerned. Yes, I think you should get rid of this guy ASAP, but equally as important, you might want to use this as a learning experience and be a bit more decerning in your dating practices of sleeping with people you have only recently met. I am not trying to judge you, but we have all been there in our younger days. Some times I wonder how I made it through those years without some thing really bad happening to me. (rape, disease, unwanted pregnancy, emotional trauma ect...) If I only knew then what I know now type of thing... You might be like me and skate through the dating life unscathed, but I know numerous girls that have had devestating things happen to them b/c they put themselves in very compromising, unsafe situations. Be smart. Be safe. Good luck!