Yes. When you share something with someone, or put an effort for someone, out of the depths of your heart, that's when you're vulnerable for rejection or ignoring.

I unfortunately know it from personal experience, from way before I entered the job market. I've always been full of enthusiasm for stuff, but after few unfortunate episodes in my past, I find it hard to share that enthusiasm with people - especially those close to me. I like to think I'm making progress in fixing the damage, but the process is slow.