Hey, I just got caught up, I am inclined to go with what Heywire says; that the texts don't sound at all romantic, so perhaps they were work related. But if you feel in your heart that something is going on, or that ow is pursuing your H, and he might be just being cluless, then I would put the sim card where he could see it, like on the kitchen table, and wait for him to ask where you found it.
Maybe the look on his face will tell you more than an outright accusations would. Sorry, this is happening to you, it sucks in a major way.
