Fiancé has libido issues. help and encouragement plz. 😔

🐉Minatsu🐉
I love my fiancé so much. We've been together for seven years. We finally lost our virginities together last month. We've only done it twice so far but have wanted to do it so much more. My libido is much higher than his. And that's never bothered us.
What's been really bothering me though is I feel that he has self esteem issues regarding not having enough stamina or energy for sex most of the time and he feels extremely guilty by this. Sure I get blue balled, but I don't care (no one ever died of blue balls 💁 just water off a ducks back)--I'll always love him weather we have sex everyday or never again. For me, sex should be quality over quantity.
I've looked up low male libido on web MD and can agree that, of all the things that can cause it, he definitely would have low libido due to poor diet and exercise (he's a home body like me). But I also feel he may have some anxieties/depression about his performance. I worry he suffers in silence and I'm not sure how to best help him or what to say without it sounding the wrong way.
Since we've both began having sex, we've been learning the pros and cons of it. For example: sex takes a lot of work, and it takes free time to do it! It's hard to do when you're busy and tired. I guess this is just a learning experienced since we are very new to sex still. 😳
I'm just wanting empathy, cuz I'm feeling alone. 🤕💩😢 I feel sad that he's having a hard time with energy levels. I want some advice.