<human>: I'm not sure what the balance between not jumping/diving into a relationship very quickly versus being cold, versus showing your love should be. Sometimes it feels like I'm not giving enough, sometimes it feels like I'm giving too much, too soon. 

I have a best friend. I would probably give everything to her if she asked for it and we're very unselfish towards each other. We help each other grow and learn and even though our paths will eventually diverge at some point, I'm confident that we'll still be best friends. I'm comfortable around her and I feel really relaxed. Like she won't judge me for being clumsy, or scatter-brained and accept my flaws. I love her. 

WHY CAN'T I HAVE RELATIONSHIPS LIKE THIS? Shouldn't a good relationship be just like a best friendship, but I dunno, with sex and deeper? I treat romantic relationships in its own separate category with its own expectations and I don't know how to navigate it. I've had so many failed relationships and I don't know what I'm doing differently. What's the difference?

Condense the text into a few key points
<bot>: I always thought a good romantic relationship was like a best friendship but maybe deeper and with sex. But subconsciously I treat them very differently. Advice?