my luv life

hello,
this is puneet....
m a average looking boy..... i proposed a very swt gal in my second year of graduation.... she was not my classmate, i was in different stream and she was in different stream.... but we used to share same college bus.... she used to sit with me...... she was very swt innocent caring loving gal..... she accepted my proposal and became a part of my life..... i was on d top of d world coz she filled ma life with her luv.... those days were d best days of my life.... as i feel so special and complete with her.... we have shared everything with each other... came close to each other.... spend 1 and half year with so much luv and joy but now there arises problems.... i have a very frndly and frank nature so i make frnds easily.... no being in different section i was having gud frnds(gals) who were very close to me..... so ma galfrnd thinks m going around with others gals of my class specially with my best frnd.... everytime she saw me talking to my best frnd she thinks that i also love my best frnd. we used to argue a lot on this topic and this arguement results in difference between me and my galfrnd.... for her sake i stopped talking to my best frnd but didnt told anything to my frnd abt this trouble actually she doest knw that i have a galfrnd..... but she(ma galfrnd) still have problem with her..... side by side i was preparing for my cat exam..... so i was not able to concentrate on my studies......
so at that time due to frustration i did brkup with her.....
and after my cat exam i want to start my new life i started flirting with other gals..... and one of my old school classmate enters my life..... i was again in love..... she was so swt cute innocent but this time understanding she trusts me..... now i m angaged with her since 7 months....
but now my x galfnd chats with me and she told me that she havent forgetten me.... she still care for me... think abt me..... she still LOVES me.... and she believes that i il back one day.... but now m angaged with sm1 else how can i go back..... both r true buth loves me both cares for me...
Now what should i do....
go back to X gf or continue with d present