How to ask for personal space without hurting her feelings?

hi,

I'm madly in love, I enjoy being with her. The problem is that she expects me to be along with her all the time. we work in the same company and same project, so I spend almost all my time with her in office and also on weekends. she is always suspicious and asks me not to talk to anyother girls and spend all the time with her. I don't even get time to spend time with my family/friends.

She keeps on telling me to sacrifice all my friends the same way she did, she is not so friendly with anyone unsless she gets to know them very personally, but that is not my case. I'm very friendly to everyone.

Please help me sort the relationship.

Thanks,
Umar Sharief