s/he will be the one that I love

 Great!

 My guess ... and it is a guess.

Çekirdek is a seed or kernel. It is something small, and hidden.

Bayrak is a flag. It is waved on high.

Could we say:

Not with a hidden seed .. but with a showy flag

Or with poetic licence:

Not in secret ... but trumpeting it to the rooftops

But, again, this is a guess.

I guess, too, the one about Not with a cigar, but with a scarf means not those who are rich and just sit in the smoking room talking about it but waving your scarf out on the streets.

Any native speakers (or Beþiktaþ supporters?) who can help?

 I wondered what the "American English" (Amerikanca) is for club strip. If it is different I may have made people wonder what we mean by strip ... !

 Agree, about it being an impossible love story, but the lover is speaking to his or her heart, saying "why did you get me into this mess" !

 I listened to what you asked for, because being without you is impossible.

In the end, I loved too, now save me Heart.

I said don´t follow him/her still, but you went, Heart.

did I not say to you heart that you are weeping

because you loved like this, because it is a knotty situation.

 Eyes were far off from you, it was a trap that went unnoticed.

S/He is a traveller, you are an inn-keeper (or caravnasaray owner). The one you saw last is a liar.

I said the deep pain within you never goes, it stayed, heart.

 You escaped from everyone for many years, and at last you thought "I´ve found it"

Suddenly you opened up, "Don´t" I said, but you did, Heart.

Taking some poetic licence:

The green colour of leaves that have become yellow and dried

The beauty of flowers that have faded

Nothing can bring these back

But, inspite of everything,

It is not worth being sad about life.

 Not pulling down, but building up