It really depends on the kind of relationship you have with this guy that you work with.
If you are expecting more out of what happened than he is willing to give, you may have a problem and may have made a mistake.
If you are hoping that romance can come out of this and all this guy wanted was to sleep with you, you may be in for a difficult time.
So, it really depends on how the both of you are looking at this.
Many people sleep with their coworkers.
They do so for varied reasons.
They may have simply wanted intimacy without romance.
They may have done it to get back at another coworker.
They may do it in order to ingratiate themselves with this coworker and possibly establish better business connections.
They may do it simply because they were out at happy hour one night and got drunk enough to take a chance at it.
There are varied reasons.
You have to figure out what your reason was and be honest with yourself about it.
This is where the difficulty often sets in.
When you have to be honest with yourself about what your reason was for sleeping with this guy that you work with, you can tell yourself a whole lot of lies.
You may try to mask what your true intention or reason is.
You may try to tell yourself that you didn’t do it for this or that reason.
You may try to force yourself to believe that it never happened.
Listen, in the end, this was done for a particular reason.
You had a motive in all of this.
You have to figure out what that was.
The moment you understand your reasoning behind why this happened, the easier it will be for you to tell if you made a mistake by sleeping with this guy that you work with.
You are going to be around this guy at work.
You are probably going to be engaging with him in some capacity.
Even if you don’t work in the same department, you will probably cross paths with him from time to time.
The last thing you should want is an awkward work environment.
This would make it that much harder for you to go to work or do your job effectively.
This will affect you mentally and isn’t wise.
In other words, the sooner you come to terms with the kind of relationship you have, with this guy the better.
If you are truly interested in this guy and you want more out of the relationship, tell him so.
If you feel like you really want to get to know him on a romantic level, tell him so.
The sooner you put this out in the open and let him know, the easier it will be to resolve this and move forward.
You could ask him out on an official date or tell him how you feel about him.
On the flip side, if you don’t want anything more out of this and see no romance, let him know that as well so that he doesn’t get his hopes up.
Do not procrastinate.
The longer you wait, the more confused and anxious you will be.
You don’t want to constantly come into a work environment that is tense.
It would be very difficult for you to do your job to the best of your ability in such an environment.
In such an environment, you would now be risking your value at the job and this would only create more unnecessary work-related issues.