You are closer with the second:

kadirle bulusnca seni asla birakmaz yani.

Kadir- a name
bulusnca- should be "buluşunca"- when you meet
seni- you
asla- ever
birakmaz- should be "bırakmaz"- (he) won't leave
yani- I mean, in other words

the whole sentence-
I mean that when you meet Kadir he won't ever leave you.

sen= you
sandım (sanmak)= I thought

my try:
Kimdir bu, Ali aşkım? Sadece Name'in Ali'sini tanıyorum. Tartışmamızı istemiyorum, seni görene kadar bekleyemiyorum.

I said Sophie's Ali, when I said that I was going to marry you people here said "Name isn't rich, don't marry her" and then I get sad/upset, I only want to be with you my love.

Thanks SunFlowerSeed, but I looked it up in the dictionary, not too impressive I'm afraid...

Here's the full message and its translation:

Nasıl uzaktaki yıldız parlak gelirse insana, uzakta olduğun için tutkunum sana, hani en güzel aşklar imkansız gelir ya insana, imkansız olduğun için asığım sana.

The same as the far away star seems bright to a person, I'm in love with you because you're far away, and as the most beautiful loves seem impossible to a person, I'm in love with you because you're impossible.

You always think that I don't love you, I'm fed up already that you think like that, if I didn't love you I wouldn't be friends with you even for a minute, but I love you and you always think that I don't love you, that's enough already, I'm trying to show you that I love you, when I love I love with all my heart my dear and I love you deeply, you can be sure of that, I'm not like others, I love only one person and I continue my way with that person, I've set off on this road with you, ok? My love, I love you very much but you still don't understand that or you don't want to understand, now go and translate this.