Going on a solo trip boyfriend thinks I’m going to cheat?

I’ve had a rough year with 4 miscarriages and I found a great deal and booked a 3 night solo trip to Florida. I just want to go see new scenery. My partner repeatedly said he couldn’t go not until a few months from now so then he accused me of not asking him to go. Now he’s saying the last time his ex went on a trip without him she cheated and he keeps thinking I’m going to cheat on him or meet someone there. I’ve been telling him I’m not going to cheat I don’t even plan on going to any bars or clubs either but he still doesn’t believe me. Does anyone have suggestions? I hate being accused of something I’m not even going to do.