Kimi ni Todoke
Toradora!
Clannad and it's sequel
Kokoro Connect
Amagami SS
Golden Time (ongoing)
Sakurasou no pet na kanojo
True tears
Ore no kanojo to osananajimi ga shuraba sugiru
White album 2 (dont need to see first season for this
White album 1 (old anime, it will make you hate the MC but the story is good)
Ef - a tale of memories (and its sequel, MUST WATCH)
Angel beats (romance takes a while to kick in)
Kanon
Tasogare otome x amnesia
Kaichou wa maid-sama (sort of romance)
B gata H kei (comedy romance)
Toki wo kakeru shoujo (Its a movie, but it has them feels)
Girls bravo
Dears
Chobits
Sankarea

I could list a bunch more but these are my top rated romance animes between 4 and 5 stars out of 5.