How To Deal With My Stubborn Behaviour?

When it comes to arguments, apologies, friendship or even crushes I can be very strong minded and set myself on one thing and one thing only. This isn't good in my case. For instance, it would be extremely hard for me to say sorry, I can't confess my lust for someone or even create good friendship as easy as it was when I was younger. No, I'm not a sad loner but I've realised that stubborness comes with alot of bad more than good. So how do I deal with it?