Hey, so...i don't want to sound like a crazy person or anything, or be one of those girls who accuses her boyfriend of cheating at the drop of a hat, but i do think he is. With my mom.

Here's what happened. A few weeks ago, i was visiting her for her birthday. I had him drive me since my car was in the shop. I introduced him and they talked for a bit, just introductory stuff. She asked about his grades, his job, family, you know. The car ride back home, he seemed so preoccupied. He barely spoke a word to me, he asked a few questions about mom. He seemed particularly interested in asking where my dad was and the divorce. But, other then that, nothing.

Now, my mom is recently divorced and single. She is pretty, but i really hope she wouldn't be doing this. And my bf, he's kind of a horn dog. He's always groping me and trying to get me in bed, like, every hour of the day. . Over time, since then, he's had less interest in our intimate time together. He's spent a lot of time on his phone. He won't let me see what he's doing or anything.

There was a couple times, we'd be driving and he'd mention "Hey, since we're in town, wanna drop by your mom's?". For no reason.

This morning, he finally got his hair cut. (He's had, kind of, long hair. But, after a few weeks of pushing him, i got him to cut it into a more respectable style. For his upcoming job interview). We were in the area and decided to visit her again. She seemed happy to see us. We talked for a long time, at least over an hour. One thing she said was about his haircut, she just pointed it out and it looks different, i explained it to her and she said "Oh, well you look very handsome that way".

When we left, i had to beg him to leave. I kept trying to remind him about somewhere we had to be that afternoon. But he got annoyed "I'm in the middle of a conversation. Stop being pushy.". And we walked out the door, mom told him "Oh, she's always been pushy," then nshe told an embarrassing story from when i was a kid.

Now, the last crucial piece of evidence that set this whole thing in motion. I had already went and got in his car. But i noticed he didn't follow me. I looked back and he's hugging her. That's not all, his hands were kind of low. Like, on her lower back. It got me to thinking and it made feel start to worry that he's cheating on me with her.

But i just don't have that high of a libido. I hope he's not doing this too me.

But, i don't want to sound like a crazy person and accuse him right off the bat. I mean, they seem awfully chummy. Am i justified for thinking this? Or am i just being overprotective?

Tl;dr - Boyfriend has been showing less interest in our intimacy ever since we visited my mom. Am i wrong to think he's cheating on me with her?