Our relationship isn't exciting. [I Need Advice]

Create new settings. Go somewhere in the deep wilderness, create a camp with a lovely warm fire and cozy sleeping bags.

Try fantasy role plays. The more you get into acting the roles with sincerity, the better it will work. If he can't go for that, fantasise in your head.

Make sure you openly discuss your feelings about whatever's going on in your lives. Learn good communication and resolve quarrels so that at the end you understand each other better. Make sure there are no residual bits of anger or resentment from old quarrels; anger kills love.

Eat a healthy diet, get plenty of exercise (fitness affects sex), get enough sleep, and if possible avoid or resolve excessive stress. Spend quality time doing nice things together at least one day a week.

Be tender and affectionate between times of love making.

It's not exciting when you stop making plans, stop communicating, stop taking an interest in each other, when one is trying to get the other to things they don't want to do, not helping out, not supporting, when arguments are left unresolved, when resentment has started to build. When you're not interested in trying anymore! Other than that it's an illusion based upon the one waiting for the other to make the first move.

Just my opinion

Try some things that you wouldn't normally do. A date night or two is a good idea. Maybe you could try new physical activities.... not necessarily sexual lol! Although if you are comfortable enough to share kinks with each other you might find something you would both like to try.

Be a bit daring! Things that get the blood pumping lol!

I don't know.
Never been in one.

And also what exactly did you mean got comfortable with each other ?

Do you mean he is not trying anymore to impress you😐

Try new things. Change your appearance every once in a while. Novelty is the most seductive trait in the world