Am i too Paranoid?

Hi All, I have been with my girlfriend for almost 3 years now and things have been great up 6 months ago... 6 months ago i moved in with her and her parents due to work (i work for her parents) and things went downhill from there She wanted space so i have since moved out 3 weeks ago on my own and there are still problems. In the past she has never really been an outgoing person per say, and if she did go anywhere she wanted me there with her... Now, tomorrow she is going clubbing with friends on her own, i have known this for about 2 weeks now but it seems odd as to why she didn't want me there this time when we have been clubbing before and she always asks me to go. The past week we have been arguing a lot, disagreeing a lot and just tonight she said i'm too clingy and she feels like she is 'stuck' with me. Before, when we started going bad 6 months ago she started talking to a load of random guys, accepting compliments, going with the flow basically and when i confronted her about it she said it's for reassurance because i haven't been giving her the attention so she was seeking it off other people. Since the above, she has stopped talking to these random men, but as we are on bad terms at the moment and she is going clubbing tomorrow i can't help but think she may cheat or do something stupid because she seeks something off other people that i haven't been giving her... In my mind this thought is even worse with the fact she will be drunk and obviously will not be in full control. I have trusted her with everything up until now but since she has seeked attention off other men before, the trust is very 50/50 this time as it has happened before on a smaller scale. P.S. She has told me before she has never cheated on anyone, and she 'knows' exactly what she is doing when she is drunk. Another Note: When we have been clubbing before, and she has been drunk she gets very sexual/horny around me... Wanting to touch me secretly, dirty dancing etc. Bit scared she might do it with something else as im not there, or they might do it with her and she wont mind. One more thing is that she is sort of a 'catch' if men see her. Long blonde hair, tall, very attractive and she has gotten attention before in clubs even when i have been there. Hope it made sense... Help :(

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