Thanks for all your usefull comments, really appreciated them.
I'm a bit more severe on myself as I know the reason of some moves that I'm not confortable with :
these moves are 40 and 112. for these two moves, my reading was right, I did know these moves will not do anything to help the situation, and still played them... weird...
Invading the bottom left was more based on intuition then on reading... bad idea...
I like intuitaion, but I think it is not usefull for situation like this one, I just must do my reading and not being lazy.
then I succombed to fear on move 155, as I readed to much things on the first line and just get anxious to play T16 as I excepted my opponent to reply on S16, without seeing that I would just easily eat his stone in that case...that's really strange I use to close my border the right way usually...
and finally, succombed to exitation on move 218 which has no purpose at all...(after luckily destroying the wall, I started to play way to fast...)
To summarize things up, here is what I learned from this game :
1) I should be more respectful for my opponent, I don't know him, and he accpected spending time playing with me,
so I should honor that and stop playing moves that I know to be useless( like 40 or 112).
2) I must do reading more ofen and not being lazy and "hopping it's ok" to play a move.
3) try to keep cool and don't succombe to fear or excitation.
4) Of course, I still has to improve lot on go itself but that was accpected...
Now that I'm aware of all of this I hope to do a better game next time

.