Any recs for super bittersweet, angsty yaois featuring childhood friends? But with a happy...

Waiting for a long time but no reply.. must because of "Happy Ending" -- as If it's happy ending, then mostly it's not much angst..
http://www.mangago.me/read-manga/lily_and_the_rose/
http://www.mangago.me/read-manga/kishidou_club_bangaihen/
http://www.mangago.me/read-manga/tasogare_dare/
http://www.mangago.me/read-manga/tamayura_yuki_ringo/ - 2 Endings, both great
http://www.mangago.me/read-manga/getsuei/ - Age gap
http://www.mangago.me/read-manga/sayonara_koibito_mata_kite_tomodachi/- Omagaverse - gonna be happy ending..
http://www.mangago.me/read-manga/rift_conro/ - just starting/promising
http://www.mangago.me/read-manga/kanemochi_kun_to_binbou_kun/ - Bittersweet of 2 generation in 1 story/ in Dark comedy theme

http://www.mangago.me/read-manga/interval/
http://www.mangago.me/read-manga/interval_dj_garakuta_zoukangou_gougai/- Must read the dj as it completes & sweetens the main story

Have you read this one already? :O
http://www.mangago.me/read-manga/illumination/
But i don't know if it has a Happy Ending anymore! >.<

Me want too

Your request is like half way of my 2 lists. HA+
http://www.mangago.me/home/mangalist/10654/
http://www.mangago.me/home/mangalist/215/

I guess this one :'D for sure http://www.mangago.me/read-manga/complex_manda_ringo/

Wow thanks everyone!