I'd suggest Hyung, you're my idol!, it's super cute as well as being funny. I hope you end up liking it if you haven't read it already :>
here's funny BL~
http://www.mangago.me/home/mangalist/736048/
isn't marked as shounen ai, but is really similar to 19 days: http://www.mangago.me/read-manga/nan_hao_shang_feng/
Ugh this shit is so healing. :,))
http://www.mangago.me/read-manga/atarashii_joushi_wa_dotennen/
I have some!
http://www.mangago.me/home/mangalist/701575/
anybody hv some RLLY cute & funny shounen ai recs that are heartwarming?? :,)) ... (some that i've read are: 19 days, dream away, never understand)