I (22m) think I need therapy, help me out please.

Not sure what I'm looking for with this, probably just some support. I really think I need therapy now. Any suggestions would help!

Brief history: I (22m) dated this commitmentphobic girl (22f who had become my best friend, who I thought I'd marry) for over a year. She was always pushing and pulling, always throwing off mixed signals. I thought her love for me (which I know for sure was totally there and strong) would be enough to pull through. I helped her through her depression, low selfesteem, bulimia...I was there for ALWAYS. We clicked so well. She broke my heart 6 months ago out of nowhere, we got back together 2 months later for a week when she freaked out again. She admitted to doing the same thing to her first bf.

Weeks after that she started dating a guy she had a crush on at her med school. I flipped a shit since she seemed to get over me in less than a month (though she admitted she wasn't over me). We haven't spoken since that nasty ending in January.

Now, 3 months later, I still check her damn facebook on every single day. I miss the hell out of her, I'm still in love with her, and I think I'm desperately looking for proof that maybe she broke up with her new boyfriend. During the long time spans in which there are no new pictures I start feeling okay, I feel like I might be able TO START moving on...and then new pictures come up. I get to see her and her new bf holding each other in pics with titles like "they look like they're meant for each other." I get to see pics of them about to make out in clubs. I get to see her happy when I'm absolutely dying inside. I know they are probably fucking and I'm relatively against sleeping around with many people. I'm so depressed and it's been months. When I see those pics I get incredibly anxious, I sweat, I have to run away from whatever I'm doing (in this case the Bruins game on TV right now, a sport I love watching). I just freak the hell out and feel like my life is fucking shit because I lost all my hopes and dreams for the future. I can't stop torturing myself, I can't let go of those hopes, I can't let go of her because the only thing that was bad in our relationship was her fear. Life feels so pointless when this happens and it's scary, please cheer me up. Thanks, I love you guys, all your advice has gotten me through the last 6 months!

TLDR: I shouldn't check FB, just help me out, and convince me to see a therapist please. Anyone have any success stories with therapy???