1.You could look up new positions( some recommend the karma sutra, or you could google, anything you can find that wont break your back)
2.Role playing (costumes, pretend "Voyeur", ect)
3.Maybe occasionally have phone/instant messenger sex.
4.You could try new toys (textured/smooth, glass, vibrating, G/P-spot ect)
5.You could try doing the do in different places other than the bedroom (pool, table, car, bathroom/shower, closet ect wherever you're comfortable and less likely to be arrested).
6.Not actually have sex but masturbate in front of each other (or you could both just masturbate each other)
7.Sometimes people take up things like pole dancing and such to entice their partner.
8.There's 3-somes, more-somes, swingers-- though you have to be really trusting and comfortable for that
9.Some people like body paint, or covering themselves in pleasant edible stuff (chocolate strawberries whip cream ect)
10.There's always the standard vanilla romance of rose petal trails and candles and a warm bath or cozy bedroom
11.Sex swings, BDSM/Bondage, or the less intense version maybe just some blindfolds and tying each other up
12.Try out temperature play or sensory deprivation
13.Teasing or "edging" (kinda teasing the other person almost to orgasm then stopping, rinse repeat) or tickle each other ect
14.Extended foreplay? explore your partner alllllll over perhaps? dunno
Those are just some things I can think of, but hopefully it helps or at least helps you brainstorm. It's okay to be maybe a little scared to try something new, but be sure to make sure you're both reasonably comfortable with whatever you do.
Though really I think your love for one another should keep things pretty spicy. Good luck to the happy couple <3 <3