So if you go on AO3 and follow or read Odsbodkins, who is so good I encourage everyone to go read her fics, you might see this already but I have to put it here.
Warning: This is Steve/Bucky but I'll put it under the read more so you can skip it if you like.
My headcanon is that while they are brothers it can and has gone deeper and will again one day. I mean I ship them together before I put them as brothers but they always come back to each other if they are apart. Always.