Then hire a PI to investigate them and all their friends. Follow them round wherever they go to check that he/she is actually going to work/shops/pub etc and who they are with.. Check all SMSs on their phone. Check their credit card statement for any florists, restaurants etc.. Hook up spi-cams in the bedroom, lounge room and kitchen. Get an answering machine that can tape and trace every call to and from the house. Mark a small line on the lube bottle and check the level hasn't changed in your absence. Keep a record of the number of comdons in the box. Rifle through their private letters, cards and documents looking for evidence. Ask incessantly where they have been, who they have been with and whether they still love you or not. Accuse them anyway to test for any hint of guilt. And even if all that fails to turn up any infidelities, dump him/her anyway and get some professional help. What's the piont if you can't trust em?
