Emotional Instability!

Hello Sir, I am 25 yr old, male.I need help.I alwys undergo mind instabilty. I cant decide & nt able t move 4ward in life.When I ws 18,I had a crush on a girl bt it turnd out t b onesided.I did tattooed her name & did all kinds of idiotic stuff.But,I was rejected.I was in great depressn & hd a change of college aftr 2years studyin there.Latr my second crush also turnd out t b onesided.I did expres my feelngs & ws in vain.I hd documentd everythin in a dairy.Again aftr tht my degre ended wit lots of backlogs &I joind a bPO &i HD gone into severe depression and tried of ending my life.But it all has got over now.I stil havent been in any two way relatioshps.Now Im perfctly fine & happy & sometimes I gt thes flashbck memories.Deep insid somwher I feel 2 get in2 a relationship bt I feel scared what if I get hurt again & rejected again?AlsoI hav a big doubt that wat if I gt a girl who hs hd a past& is nt a virgin!Then tat'll seriosly hurt my emotions!Im a very emo person!Pls help!I did indulge myself in practsing martial arts/kick boxin and guitar stuff!What should be done? I don get any sort of feelings in me now! I feel my heart has becom a barren land..loOKING 4WARD FR GOOD ADVICES!