I think my girlfriend is cheating on me.

okay, so i've been dating this girl for 4 months now and for some reason i always get the thought that shes cheating on me. she has a busy life already, she goes to school 7:30 - 12 monday - friday. and works maybe 3 days a week. we see each other everyday though. she says her parents are very strict and she has a curfew everday. monday - friday she has to be home at 12:00  and on the weekends its 2:00. she doesnt have a car, she uses her moms extra car. her mom doesnt care if she stays out somewhere over night, she just wants her car home by the curfew time. she always says she has to pick up her brother and sister from school. one at 3:30 and one at 4:00 and then she has to go home and cook for her parents.


okay so, lets start out in the beginning. at my old apt we used to party alot and everyone would get drunk and w/e. and she would always have to leave around 2, because of her said "curfew". This one night everyone was all drinking and chilling. I was wondering where my gf went.... I couldn't find her, so i looked in my closet and there she was, right when i opened the door she quickly threw something into her purse, and looked surprised. i said what are you doing ? she said oh i was just putting some makeup on... so im thinking , Why would she be putting makeup on? shes about to leave anyways?  I think she was texting some other guy, letting him know shes about to leave or whatever.  and another thing is whenever she does go "home" we text for maybe 5 minutes and then she says okay "ima go to sleep gnight love u" , and there were alot of times i would text her back asking a question or soemthing something , and she never replies. some nights i would even call her and she would never answer. and then next day she says sorry i fell asleep on you. but i think shes just cutting me off to spend time with someone else. so alot of this has been going on, plus alot of other things, stories not adding up , etc.


just recently she came over after work, and it was me and few friends chilling.. she quickly showers and then re applies all of her make up and everything. and she was texting someone on the phone in my room. me and my friends were in the living room. after about 15 minutes she said, okay baby i g2g home, dont wanna get introuble . and she leaves. and when she got "home" she texted me okay baby gnight i love you. and that was it. so im thinking... okay.. seriously? why would she have to shower tonight? she could do it in the morning. AND why would she reapply all this make up just to go home and sleep? that doesnt make ANY sense. I questioned her about it the next day and she said, she only put it back on because the shower doesnt remove all of it, and she didnt want to scare my friends off so she reapplied it.


and just last night. she came over and we went out for a walk, and a light job, went back to my place, made dinner. and then after she says okay ima take a shower, so she gets in the shower, and it was a long shower , maybe 30 minutes. I honestly think she took her phone in there to text some guy to let him know shes about to head home. after she gets out of the shower she gets changed into some differnt clothes that she brought in with her sports bag. so im chilling on the computer and i see her go to her purse and i walk over there and she quickly hides something in her back pocket.. im like.. wtf... so i try to reach for it and she gets all defensive and puhes away and goes into my room.. i try again and she accidently knocked over a glass and broke it.. she picks up the glass and goes into the kitchen and throws it away... and then walks back to her purse to try and put it away. i grab for it.. is her eyeliner... i said. .wtf why are you hiding make up from me? are you trying to sneak into my bathroom and put it on? are you going to see your other bf tonight? she said omg lol, seriously? i wasnt hiding it from you , i was just joking with you. but i know for sure she wasn't i can see it on her face. she goes on telling me im crazy for thinking that stuff blah blah blah... so then w/e . around 2:00 she goes home and i text her , did you make it in? (cause she says her parents lock the doors) she said, yes. and then texts me right after " goodnight ilove you" , i waited 3 minutes.. called her a few times and i get no answer... so wtf is up with up?. the next day she texts me oh sorry i missed your call i fell asleep.

so idk what the hell is going on. another thing is, she always has all these extra clothes in her car, clothes, shoes, and her gym bag, which has clothes, perfume , all that stuff. like for example one night she came over wearing these clothes... she went home that night and then went to school and came over after school... we took her car to go out and eat. and i look in the backseat and i see the same clothes that she was wearing the day before. so im thinking wtf. why would those clothes be in here? if she went home, wouldnt she change them? maybe its just me and i think too much. sorry for the long post but seriously i cant take it anymore, i hate thinking this way . i love this girl and she says she loves me too, we see each other everyday. and were always texting , or chatting on facebook. but idk i just get this feeling and start thinking about " what if " . plus with all these weird signs i can't help but think its true. so idk .  Any opinions and suggestions or ANYTHING would be very helpful.

Thank you curezone.