27M fiancé doesn't want to have sex with me 27F often

We have been together for 5 years. Recently engaged. And over the last 5 months or so a series of events have happened that have made me question if he really enjoys or wants to have sex with me. I hope im just over thinking it all.

Ive walked in on him jacking off to porn a few time when I was out and came home early during the day.

I found a pocket pussy and butt plugs in his drawer. He swears he was just curious and doesn't like them. Not sure I beleive it or if its bc hes embarrassed or doesn't want me to feel bad.

when we were on vacation a little while ago I was about to hop in the shower, asked him if he wanted to join me (for sex) and he said no he was tired. I said okay. I got ready to get in the shower and realized I needed my phone charger. I stepped out of the bathroom and found him jacking off to porn. I was quite upset bc I just asked if he wanted to have sex and he said no. he basically said he was dumb for doing that and sometimes hes just lazy and its easier to jack off than have sex.

2 months later on another vacation, I went to shower and when I came out of the shower, he looked guilty and caught off guard. I took his towel off his waist and he had a boner. He admitted he was jacking off to porn.

We have sex about once a week. Id like to have sex more. Ive communicated it and he said he will do better but doesn‘t really.

I feel like he doesnt want to have sex with me and rather just jack off to porn. All these sex toys make me feel like I am not enough and he needs more pleasure than what I can provide. Ive tried talking to him to see if anything is wrong multiple times and he swears to me everything is okay, hes attracted to me and loves me. However to me, it doesn‘t feel like it. We used to have sex multiple time a week. Half the time when I initiate it, he tells me “tomorrow” or “im tired”. He will initiate it, a good amount of the time, but its typically only when hes drunk. My thoughts are, he jacks off during the week to satisfy his needs and then on a weekend if hes drunk then hes horny and will be down for sex.

Am I dramatic to feel this way? Are toys and jacking off when im available to have sex normal? Is sex 1/week normal?