How do I know if I still love her?

My girlfriend and I have been dating for four months now and nothings wrong we talk every day we never ever fight but I'm not so sure anymore how I feel about her. It all started at mine and her friend jami's party...jami's a girl...jami invited me and I was the only guy from a diff school she invited and jami and I didnt really have a thing but I wouldve deff liked to have one its just unless I texted her she wouldnt text me and she didnt seem like my type soo I didnt really talk to her much and we were just friends. But at her party I met this girl emily who is my current girlfriend and at first emily was the same way jami was where she talked to me for the first day or two after meeting then it just kinda faded. But then about a month after the party me and emily started talking again and then after awhile I kinda started to like her and she started liking me. But for the first few days after she had actually come out and said she like me I was kinda hesitantt and I didnt wanna screw it upp if I jumped in to early or iff I truly liked her. And in the mean time jami who really hadnt been in the picture since her party had found out me and emily were kinda talking and all of a sudden she started talking to me everydayy and saying she missed me and I immediatelyy felt terriblee because then I started doubting my feelings for emily even more andd I just really wasnt sure what to do because how could I tell this girl a week after telling her I liked her that I dont like her. And soo I was really confused and I kept thinking about it and I talked to a couple friends and none of them really helpedd me to much but one day it just kinda hit me and I realized that I really did like emily alottt and that I didnt like jami or any other girls and that I truly did like emily. Its now been four months we have not had one single fight we talk every day and truthfully everything is perfect. Except for one problem im not sure how I feel about her anymore because after that one day where it all just hit me I missed her like crazy every day all day for four months and during school I couldnt wait to get out so I could talk to her and I would try and make my week go by as fast as possible so I could get to saturday and spend the whole day with her. Except for the past few days I havent really missed her and im not excited to see her this weekend and when I think about being single and going out with my friends like I used to and just not really having anything to worry about sounds really good to me andd I feel absolutely terrible for feeling like thiss and the worst part is I dont feel like anythings changed andd it makes me wonder if I ever loved her and thats just one of those things I never wanna do to a girl is tell her I love her and then just end it. And im just reallly confused as to what to do with all this and if I should break up with her or mabey suggestions on how to kinda get that spark back and our school semi is coming up and im really hoping that can do the trick but anything else would be much appreciated. Thank you.

Oh and just one thing you might wanna take into consideration is for about the past week and a half I have been having major family problems and when I say major I really mean major...as in my sister is accusing literally about 9 different people 6 of which are in my family (uncles, cousins, my dad, me, my mom,) of different kinds of abuse to her and others...it started with sexually allegations against my dad saying he touched her...which is a complete lie and even my mom doesnt belive her and my parents are divorced. And then rose to my uncle beating my aunt and 3 cousins except the oldest of the three touches the younger two...and then when she found out my mom and I didnt believe her shes saying weve been trying to kill her and she iss a complete mental case and as I am typing this my mom and sister are at CPEP trying to get her intitutionalized...so I have been dealing with a lot that mabey instead of all of it hitting me because I havent been really sad or anything over it just very angry for short periods of time after she comes out with a new story that mabey its all numbing me to stuff and once it all passes that ill start missing my girlfriend again and things can go back to normal but I dont really wanna use this as an excuse to not live my life how I normally would soo im just asking for help from anyone who might be able to. Thank you