i cheated on my bf

ok so i met jake in law school last semester and we r been dating since then. everything is good between us but i guess u can say im feeling a bit restless. one night after classes, my friend becky invited me to her place for drinks and music, said she was having this party. jake was out of town visiting family so it felt safe enough to go. anyway there were like 20 people there from school and work but i only knew a few. its not that im into parties or anything i just wanted some change in my life for one night, u know? then this guy came up and introduced himself as dylan, hes new on the law faculty here. he was real nice, kept buying me drinks all night. after a while i started talking about how boring things have gotten with jake, not sexually but just like our routine has worn thin. i didnt mean to say it out loud but it felt good to vent for once instead of holding back everything around him. dylan got that look in his eye and leaned close, told me if im so bored he could spice things up. so long story short we end up going into this private room together, no real words needed between us by then. i took off my top right away when the door shut behind us, dylan was already hard through his jeans like a fucking rock man. we got naked fast, had quickie sex on the couch there, really just balls to the wall fucking as much as possible before he came. then it all went downhill from there - i couldnt stop thinking about what happened while im away with jake now, constantly worried hes going to find out and end things. but part of me wants this to happen too so we can move forward fresh. am i being an asshole? do people ever really get over cheating or is it just a matter of time till next one?