<human>: Give me a shortened version of the text

So, I'll guess I'll start off with this- I have trust/security issues.

I have been dating my girlfriend (My 1st) for about 5 months now, and everything's been great, despite a few verbal fights here and there. 

Sigh.

I'll just come out with it. I sometimes overthink and worry that my girlfriend could cheat on me. I worry about her exes and if she still has feelings for them, I constantly check her twitter mentions or exes who like her photos on Instagram to see if they like her pictures. I know, it sounds horrible. I'm just that insecure about losing her.

But here's the kicker. She constantly tells me she loves me and she's written me numerous love letters about how I'm the only one she cares about, thinks about, 24/7. She posts pictures of us, writes statuses about me, everything. It's true puppy love. Except it's not on my end. I'm constantly worrying about other people trying to snatch her away from me or flirting with her.

And she doesn't even have a history of cheating. She's had one hookup at a party before (as in, just making out, not sex).

And.. just the thought of her making out with someone else, it makes me feel sad inside. This sounds pathetic, I know. It was also before she met me... I just... I dont know why this bothers me so much. She's had two boyfriends before, only one was important to her, but she's told me that she loves me more than she loved anyone else, and that he's just a distant memory.

She's amazingly pretty, cute, sweet, lovable, and adoring, and she's mine. I just need to get that through my thick head.
<bot>: I constantly overthink and worry about my girlfriend's past and wonder if I'm going to lose her despite her being fully commited to me.