im 18 years old..a senior college student..but..others think that im antisocial..coz i dont mingle much with my classmates and my friends..i only hang out with those who are very close to me and who knows me very well..and others had told me..that they're afraid talking to me coz im always serious..the reason behind that is.. i always have something to think about in my mind..its like..my thoughts are racing..also, when i was still in high school..i am used to crying..im really sensitive..and when i start crying (in public or privately) im finding it hard to stop..i cant stop myself from crying and it causes my chest pain..and im finding it hard to breath...im an only child..im a loner..and i have a pet at home..cats..do you think i have some kind of disease or something?..asthma or heart problem?..i need your help please...