Should i feal bad? I mean what do Du think?

So me and my boy friend who i have been going out with for over a Jahr have decided that even though we are still together like as a promiss couple, we decided that we are still alowed to datum other people so we don't feal tied down.
Now me and my bf have well...gone all the way, and now that i have datted and made out with several other people, and eve though i am "technicaly" alowed to do that, i feal kind of bad...like a whore.
And i have dated like 4 other guys and he has dated no one els and even though we still Liebe each other i feal bad. But he hasent dated anyone els, should i feal bad for being in like 4 nomal reationships and one big seriose realtionship? Should i feal bad? like a whore? what do Du think this means and how do Du feal?