Almost 2 year relationship??

So i been together with my boyfriend for almost 2 years in November. it seems like forever though! everythings going good except we dont live together yet.. we are soon though. All i wanna know is what to except when it comes to being with someone for 2 years...?? I mean we do fight , and disagree on everything... Idk though i feel weird .. I feel like hes no attracted to me anymore.. I feel like hes lost interest in me... Idk😪 I just feel weird and since we been toegther for almost 2 years, i dont know if its normal to have any doubts and feel very scared about the relationshp, scared as in what to expect and i feel like he will find another girl... Idk he treats me right and good! he spoils me everyday and gives me whatever i want i mean its not like he doesnt care im just thinking negative right now 😞😞😞 ? can you girls help me out pleasee