I don't know if I get it, but let's try :D
Some bittersweet BL:
http://www.mangago.zone/read-manga/non_tea_room/
http://www.mangago.zone/read-manga/senya_ichiya_shitone_no_himegoto/
http://www.mangago.zone/read-manga/hatsukoi_no_atosaki/
http://www.mangago.zone/read-manga/nekasenaide/
http://www.mangago.zone/read-manga/gravity_eyes/
http://www.mangago.zone/read-manga/last_portrait/
http://www.mangago.zone/read-manga/nichijousahan_bi_beautiful_life/
http://www.mangago.zone/read-manga/shinjuku_lucky_hole/
http://www.mangago.zone/read-manga/white_black/
http://www.mangago.zone/read-manga/soul_kiss/
http://www.mangago.zone/read-manga/okubyou_na_yubisaki/
http://www.mangago.zone/read-manga/desire/
http://www.mangago.zone/read-manga/jigoku_meguri/
Interesting plot (not only sex and "lovey-doveying"):
http://www.mangago.zone/read-manga/koujitsuei_no_tobira/
http://www.mangago.zone/read-manga/hanazono_no_kioku/
http://www.mangago.zone/read-manga/j_no_subete/
http://www.mangago.zone/read-manga/life_love/
http://www.mangago.zone/read-manga/neo_arcadia_yami_ni_saku_niji/
http://www.mangago.zone/read-manga/koi_to_wa_yobenai/
http://www.mangago.zone/read-manga/grant_my_wish/
http://www.mangago.zone/read-manga/calling_miyamoto_kano/
http://www.mangago.zone/read-manga/gerard_to_jacques/
http://www.mangago.zone/read-manga/meikon/
http://www.mangago.zone/read-manga/tsukigasa/
http://www.mangago.zone/read-manga/cut/
http://www.mangago.zone/read-manga/the_4th_guard/
Most of them are both bittersweet and interesting imo (I've just divided them for my own convenience).
I'm sorry if it's not what you've expected. I tried to avoid the "path" you mentioned, but the truth is I may not remember everything so clearly, so please forgive me.
Do you know Miyamoto Kano? Her stories are almost always like that- they leave you with a bit of sadness, even if there's a happy ending.
I've read the second one, but I've been avoiding the first one for some while now, even though i've heard many say it's good.I tried reading it once, but when i saw the guy drooling over the new guy who enters the bar, it was a turn off for me and he took that guy to his house for.. i forgot what reason, i kinda lost interest.Please tell me, do they do it at his house?
I'm very very very tired of reading bl with stories which go like this-
1.seme and uke fall in love
2.confession
3.sex
or stories with the order 3, 1, 2 and then more sex.
So does anyone know any bl that aren't tragic, but leave you with this sad feeling even though the ending is happy and the focus is on the story rather than uh..for lack of a better word, "dark" sex, that is, mangas where 90% of the time, the panels show gloomy bedroom scenes and the remain 10% is the uke's school life!! Sex is fine, just not too much of it.