Raisin sort out your tilting ffs!
Preflop I think is fine, no need to talk about that.
The flop is good for you of course. With the bet out of the big blind and the flat call my initial assumption would be the BB has top pair and the flat caller utg has either the lone A hearts or the nut flush. If he has a set it would have to be QQ or TT. I dont think this is very likely for a couple of reasons 1) He would probably raise with these hands preflop (ok he was UTG so he might not have, but he PROBABLY would have) and 2) Even if he did limp preflop with this I am sure he raises on the flop here with a set. So I think he has the nut flush draw or possibly if he was slowplaying it would be the nut flush (I think he raises a non nut flush here due to the possibility of a 4th heart falling on the turn - a card he doesnt want to let come off for free). I would pretty much think I had the best hand at the moment raisin and go ahead and raise like you did.
lol WTF at what happens next (at least I would say this to myself if I had played this hand

). Jossi comes back with another raise and then jochen another?. Wow I guess I would have been wrong with my initial reads. Jossi must have a strong hand here to do this. I would think either a non nut flush (this hand would have bet the flop like he did originally probably) either that or at least top two pair. When jochen comes back again over the top I can only assume he was slowplaying the nuts on the flop. If he just had the lone A hearts in his hand then yes he might want to gamble to win a big pot but wouldnt he just call to drag you in and give himself better odds than raise again which means its more likely you fold? You now certainly dont have the best hand at the moment. At least one of them clearly has a flush, it doesnt take a world class player to figure this out now but is it worth your while drawing to a FH?. It is unlikely either of them have a set I think for the reasons stated before. However it is perfectly possible jossi1 has two pair I think. It COULD be flush over flush with jochen having the nuts and jossi the lower flush but I think given the flop betting 2 pair for jossi is a big part of his possible range as well. This kills your outs. Your clearly drawing and although on the face of it drawing to a FH would be +EV it certainly is not if jossi holds QT. Even if he holds another two pair then he is killing your outs and makes a call a long term loser. I would probably have folded on the flop losing the 48 I put in fearing jossi1s hand was killing mine. Id have called with QQ here if the odds were good.
Jez.
PS. Just looked at the results. I got the hands wrong, jochen did have the Ahearts but he did not flop the nuts and jossi actually had the flush. As it turns out you had the correct odds to gamble and nice to see you scoop a good pot for 2/4 raisin. I still think jossi turns up with two pair often enough here to kill your hand tho..