Stuck in a Rut

I'm not sure what my problem is.  I've been somewhat depressed lately, and I'm not sure why.  I'm bored with my life.  It just seems so repetitive (go to school, study, work out, sleep, repeat).  After reading another person's blog (you know who you are), I started thinking about all the things I wish I had time to do.  I miss photography, playing trombone, scrapbooking, running for more than 20 minutes at a time, relaxing without feeling guilty about it, spending time with my family.  I wish I knew people outside of vet school so I could escape it every once in awhile.  There are things in my life that I should be excited about.  I'm singing in the vet school talent show in a couple days, which is something I've never really done before.  I'm starting personal training sessions this week.  But even though I've been looking forward to these things, I've found myself not wanting to do anything (other than sleep) lately.  I don't even want to go out with friends because it sounds too exhausting.  I'm just not finding much joy in my days and don't know how to fix that. 

I think the part that bothers me most is that I'm not generally like this.  I'm supposed to be upbeat and happy.  I hate being around people who complain constantly, and I feel like I'm becoming that person.

I'm going to share some Miranda Lambert with you now, because she is awesome.

Carrying the weight on the end of a limb
You're just waitin' for somebody
To pick you up again
Shaded by a tree, can't live up to a rose
All you ever wanted
Was a sunny place to grow

Pretty little thing
Sometimes you gotta look up
And let the world see
All the beauty that you're made of
'Cause the way you hang your head
Nobody can tell
You're my virginia bluebell
My viginia bluebell

Even through a stone
A flower can bloom
You just need a little push
Spring is coming soon
Umbrella in the rain
Let it roll off your back
Weather what you can, realize what you have

Pretty little thing
Sometimes you gotta look up
And let the world see
All the beauty that you're made of
'Cause the way you hang your head
Nobody can tell
You're my virginia bluebell
My viginia bluebell

Put a little light in the darkest places
Put a little smile on the saddest faces

Pretty little thing
Sometimes you gotta look up
And let the world see
All the beauty that you're made of
'Cause the way you hang your head
Nobody can tell
You're my virginia bluebell
My viginia bluebell

(Miranda Lambert, Virginia Bluebell)