Depressed. . .

I've been feeling really depressed since late last night, and its carried over into today.  I didn't sleep very well last night because I have so much on my mind and I've been in such a fog all day today.  I feel like I'm standing in the woods with two paths in front of me. both flourished with flowers and beauty but i see a rain cloud in the distance. which path will keep me dry and safe? which path will be more fun? Most of all. . .which path is the right path?  Its never good when I start thinking and thats what I've been doing since last night.  I wonder if what I'm doing is right and I try to think about all possible outcomes and it just depresses me.  I love my boyfriend very much, but at the same time I feel so alone.  Its hard to explain, but I'm trying.  I feel so detached from everyone lately.  I've been too busy to hang out with my friends, work, school, theatre are all I have time for and I feel so overwhelmed.  I just want to cry.  Last night when I was with Tim, we had to go over to his bestfriends house who Tim lives with most of the time.  While we were there Tim told me I could look at his cell phone but he warned me that he had nudey pix of his ex and old text messages.  He hadn't deleted them because his phone is shut off atm and so he hasn't used it really since they were together.  I didn't mind though because I know they are broken up and he is with me now and its all good.  But seeing the pictures of her and reading the texts really got to me.  I didn't say anything because there is nothing to say.  I have no clue why I feel this way, but I do.  I feel awful.  It has been eating at me and I really just need to get it out.  Why is it bothering me so badly?  Its not like he is cheating on me or anything.  I know he loves me.  I've had ex boyfriends, and I understand he has ex girlfriends. . .I dont get it.  ugh I hate feeling like this and being so depressed.