
again if Mafuyu didn't fully love UE he won't have told him he love him. it has simple has that, from a lot of pain he felt in his past etc...Mafuyu is not the kind of guy that will get into something and not fully commit to it.
but it does not a black and white thing, you can't just "MOVE ON" from someone that was with you for so long and died. like real life, some left of it will always be there, no matter how much you want to forget about it or move on. and you know what, there is nothing wrong with having a past.

All I'll say on this matter is two things: 1) They're young. Yuki was Mafuyu's first and only relationship before Uenoyama and it came to an abrupt and violent end at what I can only assume is something that he blames himself for. They were childhood friends and as close as two people could be. It's going to leave a scar and Mafuyu is going to be cautious and scared of various things going forward. He certainly seems to love Ueno, but is possibly more subdued in showing it? We haven't really been shown all that much about how their relationship has bloomed thus-far- we only get snippets, which is a shame. I chalk his to-ing and fro-ing to lack of experience and youth.
Secondly, the only thing in this chapter that had anything to do with their relationship was the fact that Mafuyu was a little cold/closed off from telling Ueno about his thoughts on being in a band full time. It's a HUGE thing! It stands to reason he's a little overwhelmed, especially since he's the newest member to the band and also the one with the least experience when it comes to actually playing. He probably never thought about it being a full-time thing before. He's probably frighted that saying 'no' or showing less enthusiasm than a definite 'yes' to Uenoyama would upset him since he was so excited about it. He probably doesn't want to upset him because of what happened in the past (yes, people learn from their experiences, it's not all about Yuki). You have to remember there are things going on behind the scenes... They're not really flat characters- they have personality, a history, relationships and mental states of their own. Gusari is doing a great job of making them act quite realistically...
Aah.. Sigh. I want to write a bible but it's not worthy. All i've got to saying it's that is so unfair how Ue isn't loved back as he deserves. He deserves to be completely loved, not half loved. I'm so done with all the Yuki thing, mafuyu just getting more annoying every time, Yuki this yuki that. God, he shouldn't have gotten into a relationship with Ue if all he will do all the damn time is think about Yuki, I DO UNDERSTAND he loves him, but he has to let him go and commit to the damn relationship and at least try to love the person who loves him so much, IF NOT THEN HE SHOULDN'T HAVE AGREE TO BE IN A RELATIONSHIP. The love between Ue and Mafuyu is so one-sided. Yeah, he might love ue in some way but we all know he's not committed to it 100%. And that's pretty unfair for Uenoyama, who's so in love with mafuyu