I could throw out all the stereotypical signs of cheating: he says he has to work late, but when you call the office, no one answers; he avoids intimacy and sex; he talks a lot about a female friend or colleague; he's vague or defensive about where he's been when not with you. But none of these so-called signs are proof of unfaithfulness. In my humble opinion, rather than accusing your partner of infidelity, the safest bet is to address the issue of trust in your relationship in general. Whether by yourselves or in couples counseling, your feelings have to be acknowledged and worked through together if you're ever going to build a genuine, trusting relationship. This is not easy -- only absolutely necessary.
Trust is never a sure thing. It's precious precisely because of how vulnerable it leaves us. But trust upheld is one of life's richest treasures, well worth the risk of being honest about our feelings, no matter how painful. Good luck.
4. What does a guy really think when you have sex on the first date?
He really thinks you're slutty. And that, sister, is not necessarily a bad thing -- depending on what you want out of the relationship, of course. Unless he believes that he's the exception to the rule (in other words, if he doesn't think you fall into bed on the first date with every guy), doing the horizontal boogie so early on means your relationship is going to be mainly about sex. When you're making plans for future dates, he'll be thinking of you on the dinner table rather than across it. However, if you wait and get to know each other on an emotional level and let the physical follow, then the relationship can be about both. The exception: If you two have been friends for a while, then hit the sheets on your first "official" date, don't worry -- your relationship can be hot and heavy.