FWB///please read, advice needed!!:)))

so me and this guy are coworkers and didnt begin talking until september of last year because we were both in relationships. once he figured out i was single, we began talking. we made plans to hangout the first time and that ended with us hooking up (best sex i’ve EVER had). we hung out the next week to and the same thing happened. after that we began talking but then he ended things. but very soon after he got into a relationship with another girl. i became very sad after that bc i had feelings for him and wanted them to go somewhere, i always thought he was cute, he’s got an amazing personality, and honestly i get butterflies everytime i’m around him. anyways he was single at the beginning of this year so we started talking again and agreed to be fwb but i only did that because i wanted to talk, behind around him, and hoped it would grow into a relationship. after a few months of being fwb he has another gf but at work he is very flirty and touches me all the time, and i don’t stop him bc i want to date him so bad. i’ve never felt like this with anyone else and really want to see where it can go. any guy that has tried to talk to me since last september i have shut down or just rejected because i’m head over heels for this one guy, like i always think about him and it’s to the point where i have dreams about him now. idk he always hugs me at workand asks how my day is and we have genuine conversations. am i crazy for wanting this to go somewhere since he has a gf or keep trying because i’ve never felt this way about anyone before? i know i feel this way, but i don’t think he feels the same way about me...