<human>: Was hoping some of you could give me some advice. 

I've been dating a girl for 14 months now, and she is honestly amazing. She's sweet, beautiful, caring, loving, innocent.. Really just the whole package. I just don't seem to be happy though, and lately I can see myself snapping at her for no reason. I also miss my ex a lot sometimes. 

I know that sounds terrible of me, but it's the truth. 

As much as I try be happy with my current girlfriend I find it difficult to do so, and I do love her, I'm just not "excited" and "alive" most of the time. 

The girl is also madly in love with me, I am her everything as she doesn't really have any close friends, only her family. I see her once during the week and the entire weekend. It's gotten to the stage where I roll my eyes when she calls, even though she has done nothing wrong whatsoever. I feel awful and wish I could shake this feeling. If I break up with her, I'm worried I'll never find someone as amazing as her and if I don't I'm worried I'll feel like this forever, like a limbo. 

I really need help guys, I'm literally depressed over the issue.

Give me the gist of the text in a nutshell
<bot>: not excited about my perfect girlfriend anymore and can't shake the feeling and also don't want to break her heart as she's the sweetest thing alive.