Shounen-ai is yaoi without sex. So usually the couple gets together in the end, but they don't have to. The best examples I can think of are:
http://www.mangago.me/read-manga/bloody_mary_samamiya_akaza/
http://www.mangago.me/read-manga/a_man_like_you/
http://www.mangago.me/read-manga/back_in_time_to_you/
http://www.mangago.me/read-manga/raising_a_bat/
Oh. The first one -Bloody Mary is like what you said, minor BL interactions mixed into a larger story. It's super good though.
I haven't read a lot of shounen ai but the ones I have read haven't particularly had the main couple get together one screen, instead it was heavily implied. One completed manga that I would recommend is No.6. There is also uraboku aka betrayal knows my name- an incomplete one with heavy implied relationships between male characters.
You should read the genre! I actually prefer shounen ai more than Yaoi because in Yaoi most of the time the story jumps right in sex (tho there are very nice Yaoi too). Shounen ai is more focused on romance or the development of the relationship between the characters rather than sex (like in Yaoi but not all Yaoi are like that) so here are some manga that I think you should try:
http://www.mangago.me/read-manga/guang_xiang/
http://www.mangago.me/read-manga/drip_drip/
http://www.mangago.me/read-manga/lucky_number_13/
http://www.mangago.me/read-manga/julian_and_youth_a/
http://www.mangago.me/read-manga/yuki_no_shita_no_qualia/
http://www.mangago.me/read-manga/delivery_boy_debacle/
http://www.mangago.me/read-manga/haikei_niisan_sama/
http://www.mangago.me/read-manga/ramune_no_shalala/
http://www.mangago.me/read-manga/seven_days/
http://www.mangago.me/read-manga/number_call/
http://www.mangago.me/read-manga/gunjou_no_subete/
http://www.mangago.me/read-manga/shuuden_elegy/
http://www.mangago.me/read-manga/houkago_edge/
http://www.mangago.me/read-manga/never_understand/
http://www.mangago.me/read-manga/meeting_him/
http://www.mangago.me/read-manga/sasaki_to_miyano/
Most of these are complete.
Have fun~
The one you talked about is "Bromance"
- Boys Love [BL] with explicit sex scene = Yaoi
- Boys Love [BL] w/o explicit sex scene = Shounen-ai
I group Shounen-ai out in these lists, if you wanna try..
http://www.mangago.me/home/mangalist/200/
http://www.mangago.me/home/mangalist/116513/
http://www.mangago.me/home/mangalist/10654/
Thanks so much guys, I'm feeling much more confident about it ^^
GUYS I'M HAVING A CRISIS! I really want to take a dive into the shounen ai genre but I'm kind iffy whether I should or not. I feel like every story is just going to have minor BL interactions and that's just it, the two are never going to get together in the end. Am I just making this up in my head? Does the shounen ai have to have the romance tag to have them get together in the end? Also, any recommendations to start me off? Thanks for the feedback!