I really like manga with realistic love type similar to NANA, but coz its discontinued can...

If you mean realistic in the sense I interpret it, be ready with a box of tissues! Here are some mangas that I think fit the description: Life Senjou no Bokura, Colorful Line, Gunjou no Subete, Karini mo Renai. You can also try searching for 'Slice of Life' in genre. Hope this helps!

Thankyouu ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄

I love this (●'◡'●)ﾉ
http://www.mangago.zone/read-manga/mars_souryo_fuyumi/