Red string connects you to one person, it takes time to find your other half, bit Alhaitham doesn't mind waiting, soulmates to him is a different mindset to others. He's not really into love and doesn't see himself dating and getting married to someone and have kids with, to him, it seems unpeaceful but that was certainly the literal opposite to what his best friend thinks

"You're seriously not going to try to find your other half?!" Kaveh exclaimed with a shocked face as he sat down next to Alhaitham in the library

"I told you countless of time Kaveh, I don't want to have one. I'll just wait till the time is right. Besides, you know I'm not into whatever this is. I very much prefer a single life." Alhaitham responded back to you, with his face still stuck to the book