Quick & dirty translation:
1) part of a conversation a character is overhearing
探しましたよもう！ We searched!
-> Do you know how much we searched for you!?
勝手にいなくならないで下さいよ！ Involuntarily(?) disappeared not good please do!
-> Don't disappear just like that!
ウルセー No way
-> Shut up
俺が何処に行こうが俺の勝手だろうが
-> My whereabouts are none of your business
-conversation cuts off-
2)とりあえず離れろ First, let go off me.
ケチくさいなー (stingy? modest?)
-> Don't be so mean!
るせえ Shut up.
3)そうだ 帰らなきゃ Right. Gotta go
俺にはやらなきゃいけない事が山積みじゃないか in order to go, big event must do
-> I have an awful lot of things to do, right?
4) : this one's really confusing @A@
尾行は? was she followed?
無い筈です not expected.
-> I guess not.
筈ってお前… she must've...
-> What do you mean by "I guess"...?
今ドルが居ないんですよ Now Doru musn't
-> Doru isn't here right now.
あれ？Huh?
悪いけど後でな We'll talk later.
5) んだようるせえなもー Enough already (?)
-> What, you are such a pain!
6) そりゃまあ… I suppose...
-> Well..
身体が一緒な訳じゃないし Since we don't share the same body
俺を知ってる訳じゃないし I can't just expect you to feel me.
-> I can't expect you to know me [to feel sb has a WAY DIFFERENT meaning! 
]
うん そりゃそうだ Yeah, that's it. -> Yeah, that's right
7)会えただけで儲けもんじゃないか met only by luck (???)
-> To have met is already good enough.
8) フラれたわね He ditched me!
何で だめなんだ！？ 別に手伝わせてくれても良いじゃないか！ Why? Does he think I'm no good?
(Nice translation!)
まあ別にアンタに手伝ってもらわなくても it's nothing you assist receive also
-> Well, you don't need to help.
あたしたらが居るしね what am I doing(???)
-> After all, we are here.
あたしたらがって… ．．．．．．
-> What do you mean by "we"...?
9) 身元くらい探ってみろよ You can try to investigate his background if you wish.
-> You could at least find out about his background.
顔しか解らない外国人って… It's clear he's a foreigner.
-> What can I do with a foreigner that we only know his face?
どうやって探りゃいいんですか All the more reason to search.
-> And how am I supposed to find out?
ていうかあんた面白がってません？You just think this is all funny, don't you?
そーか？Why not? *laughs*
10) 俺の知ってるものがひとつもない To my full understanding
-> I know absolutely nothing.
彼の事ならなんでも知ってるつもりだったのに (?)
-> I thought I knew everything about him, but...
本当に俺の知らない彼なんだな truly I don't know what he.. (??)
-> Now I know that I really don't know a thing about him.
Hope that helps...
