I need advice!!

So I have been sleeping with one of the guys I work with since October. We have stayed together for about 3 week straight and on and off depending on our work schedules. We had both expressed that we just wanted to be fuck buddies since neither of us were ready for a relationship in the beginning. We go on late night drives, dates, hangout with his friends, and sleep together. We've had a few falling outs but seem to work together and solve them very quickly. It's now February and I expressed that I was starting to have feelings for him, and ever since then he's been extremely distant and leaving me on read. He answers my calls but doesn't say much. And opens my texts and snaps but doesn't answer back. I feel so embarrassed that I keep texting him but I want his attention and miss what we had in the beginning. Ladies I need some advice. What should I do?