Boyfriend trouble... help??:(?

Okay, so me and my boyfriend of 1 year, and 7 months have been arguing a lot lately.. and it doesnt seem to stop. One day it goes really good, then at night we're just in a horrible mood.. and the past 3 nights I've been crying. IDK whats up.. I love him a lot, and I know he loves me too, but I feel like we're going downhill.. we've argued so much lately that I dont really feel my heartache anymore like it used to.. unless its really bad. IDK What to do.. I dont want to end our relationship, It'll really just bring me down.. so.. help??:(