...The Night I Let Myself Go

I've been trying not to let my recent separation affect my job, but one night things got too much. A regular at the bar told me they understood how hard it was and bought me drink after drink. Before we knew it, he convinced me to leave with him and I ended up staying over. We both said it wasn't about the sex...but that's exactly what it felt like. Now all I can think is: did I just do something really wrong or are these things okay when you're single?