So, bit of background. My dp and I split up about 6/7 months ago, over the past month we have been speaking again and he says he made a mistake and wants me back. I still love him very much but worried things won't change and I'll be back here again in a few months time. Anyway, before we got back speaking again I found out he was on a date with someone else. This for me was the closure I was waiting for and decided that was it. That wknd I went out with a male friend and we ended up sleeping together. Both agreed it was a one off and wouldn't have happened if it wasn't for the amount of alcohol we had on board. We were both single so we weren't hurting anyone. Couple wks later dp calls me saying he wants us to try again etc. Now, do I tell him about sleeping with my friend? If we do end up getting back together I'd be worried he would find out as these things normally come out! I'm 90% sure if I tell him now he will no longer want us to be together. I don't want to lie to him but also I don't want to cause unnecessary upset. What do you think??