hii.im only son(age 18) to my parents.i have 2 younger cousin sisters(my dad's brother daughters) and 2 elder cousin sister(my mom's sister daughters).of my dad's brother daughters one cousin sister is small of age 9 and other cousin sister is of age 14.my cousin sister(age 14) lives in another town with her parents.we were enemies when we were child.but i dont know what happend.she came to my town for holidays.she was 5 days in our house.we shared everything she tells her problems and i was telling my problems and about my girlfriend.we used sit upto late night till 12am and chat in our house while our parents were sleeping.now she went back to her town.but before going she fought with me because of my cousin sister(age 9).she did'nt spoke with me when she was going back to her town.but later she texted me saying sorry.its been only a day but iam missing her really.i can't understand one thing we were enemies but now we turned into good friends.now i miss her badly .plz tell me why this is hapening to me.why i miss her so much?