He comes home late, hides his phone and is secretive about his whereabouts. Is he cheating? One suspicious iVillager asked members of the Coping With Infidelity board for telltale signs before confronting her partner. Here is what they said...

Look for signs like text messages from other mobiles, being late from work or things that he has started doing that he doesn't normally do. If you can't find out then - in the end - you will have to ask him, that's the only way. Good luck
simon7777

Be alert, but don't overdo it, or you can become obsessed. If you truly suspect that he is being unfaithful, ask him outright, but be prepared to give your reasons for being suspicious and tell him about any 'evidence' that you have. If you are avoiding being open and honest, so will he. Don't be confrontational and argumentative or he will just deny it, and it could turn into an argument.
cl-tootcee

Look for differences in routines, never having his mobile on around you, being really secretive, going out with his mates all the time (or saying he is!), hiding the phones bills when they come in, are all indicators. I managed to find my ex's phone bill and the bill was for £250!!! It broke my heart, but I'm glad I know now.
luvin2mch

If you think he is cheating, then he probably is up to something, because you have picked up signals that something is not right. Have you suspected this in other relationships? If so, you may be a bit paranoid and be seeing things that aren't actually there.

However, if you do suspect, just keep your eyes open. If you accuse too much he will just get used to denying it. Try asking to borrow his phone when you are next out and he is busy ordering a drink or something and look in the messages inbox. If it was me, I would want to know for sure before accusing him. Good luck and don't get caught snooping!
phil3370

I found out when the woman my partner had been having an affair with phoned me to tell me he had just finished the relationship. I had suspected for over 6 months. He had started using his phone a lot more, had installed different ring tones for different people, he was gradually more distant, unloving and uncaring towards me, never wanted sex, began wearing different clothes, and had put on weight due to the drinking and eating he was doing with her. Ultimately you must go with your own intuition.
finders2001

Chat to other iVillagers about infidelity on the Coping with Infidelity message board. Take a look at some of the LIVE discussions taking place right now on the board: