DID MY GIRL FRIEND EVER LOVED ME?need HELP.PLZ COMMENT?

Im 25 now i have dated this girl for more than 2 and half years.in these 2.5 years we had different phases,though this was kind of long distance too but i would spend about 4-5 months back home too.im my masters from england and i started dating this girl in 2010 back home in iran who i went school with.After we started going out after a while she started being all disrespectful with me and didnt really respect me as much i did,though she had always been a spoilt brat.

in the begaining she use to compain that i don't call her and talk to her that much though i always tried explaing her that i had been busy,at many points she had been inconsiderate about it,and we use to fight and patch up every week,most of the times she would literally want me to beg her to come back.but this was all usual.all this time i use to think it was my fault that she craves attention and i dont give her much,

right after the first year,she cheated me with an other guy who was not really interested in her.so she had to come back to me any how,during that one month she literally cut me off and ditched me.

i got to know about this when she came to england to see me after summer holidays in london with her friend.Even after she found i was depressed and heart broken after i caught her ,she didn't really care about it and promised me this wouldn't happen again.

as the time passed ,break up and patch up happend every other day

i always noted that she would introduce me to most of her friends and i wondered would she do that,on the other side i always noted her friends wouldn't really like me if they see or meet both guys and girls.

last year in march when me and her were on break her friend started introducing her to new guys and got her all busy {im sure she wouldve told her friend to help her get more boys} after i found out this we broke up for 6 months in the mean while she use to talk bulshit about me to one of our mutual friend.

after facing soo much i got numb and decided to date another girl.

later in aug she found out that i was getting to some other girl she started coming back to me since she knew i would always be there for her.

this time i didnt dump the other girl but cheated her since i knew she would leave any day once shes confirm im not with that girl.

later next month she came to london,we had a good time we drank and partied but after getting drunk she would argue and fight with me.

as soon as she left she got to know i had another girl friend and begged me to dump her,

i got an ultimatum for 10 days in which i had to dump her

and later i dumped her

as the time passed ,my girlfriend dumped me again after she found out that i had sex with the other girl.

as soon as this happened i decided to get back with the new girl and never speak with my ex

later when she found out again that im back with the new girl she called and told me to get back with her and dump the new one.i clearly said im not trusting her again.as of today she has changed her cell phone number and blocked me on Facebook....

but there are certain things i would want to know

every day i wonder if she ever loved me

she wouldnot have broken up with me every other day

she would not have dis respected me

she wouldnt have cheated me

she would not have talk bull **** about me to out mutual friend

she would not have been interested in meeting new guys

but the only thing that matter the most is if she didnt ever loved me why was she with me for nearly 3 years