I would say that it is.I would call this an emotional affair. IMO I think that is worse than just going out, and sleeping with someone. I wouldn't trust him either. He locks his computer, and then you found out about the other girl threw the computer, in her own separate folder. I would also have a problem with him having her on the face book. If you want to trust him again he needs to come clean about everything. Somehow the two of you need to work this out. He knows that you get on the computer, so why else would he be trying to always upgrade the locking system on it. That would tell me that he is trying to cover up something.