
Are there any shoujo manga out there similar to this?

Are you looking for any particular elements that this manga depicts?
http://www.mangago.zone/read-manga/gozen_0_ji_kiss_shi_ni_kite_yo/
I really like this one because it's hilarious, but also presents a mature and realistic relationship. The guy isn't nearly as doting though, if that's what you're looking for.

https://mangadex.org/manga/19585/suteki-na-kareshi
This one is super cute, but it's not available on here.

http://www.mangago.zone/read-manga/watashitachi_ni_wa_kabe_ga_aru/
Kinda cliche, but I like it nonetheless.
http://www.mangago.zone/read-manga/pochamani/
http://www.mangago.zone/read-manga/koi_wazurai_no_ellie/
I LITERALLY just watched Collette, a movie about a woman married to a man that is Very Not Kind and treats her like an object much like what just happened with the older brother in the manga. Please liberate yourself from that awful family, Canaria!