<human>: My first 'real' girlfriend recently dumped me as she felt we were drifting apart, coupled with the fact that at the time I asked her out she thought she was 'second pick' to another girl. She also saw a contrast between us sexually, I was usually eager to do anything remotely sexual whereas she never seemed to want to (this was not due to lack of attraction - Trust me) in hindsight I can see occasions where I maybe got moody with her if she didn't want to do stuff and I really feel bad for it, because it wasn't key to our relationship although she was convinced it was.

Anyway, now the breakup is done and gone we've remained friends for the sake
of our social group (we have a small group of really good friends, half are hers, 
half are mine and if we were on bad terms it would just split the group up). I still 
find it difficult to not think of her in a romantic sense as I wasn't the one who 
ended the relationship, she talks to me about going to parties with guys and I 
know she has a couple of guys eager to be her rebound and it causes me insane 
jealousy and I can't understand why. I still care for her, I still worry about her 
and I don't like the thought of her getting another boyfriend; I get paranoid that 
she'll be different with him e.g. they'll have sex often whereas we didn't. I have 
a history of really over-thinking things so there's the possibility I'm just paranoid.

Basically what I'm looking for is some way to stop my jealousy and obsessive 
thoughts over her; it would be a good idea to block her on Facebook but I 
couldn't bring myself to do that. Please help me out.

Give me the gist of the text in a nutshell
<bot>: I haven't got over my ex and I get ridiculously jealous when I think of her with other guys, any advice?