Is it normal to feel this guilty?

I come from a rich family and I'm always guilty! I hate when I have something that others don't have it makes me feel guilty and depressed. Like if I have my nails polished and someone else doesn't I feel very bad i don't know why but I hate this… I have an iPhone but if I go to a sleepover and my friend doesn't have one I get very sad! Am I spoiled? Why do I feel this way?

Don't start feeling guilty or you will be taken advantage of later in life.

You don't sound spoiled, you sound like a caring person.
atleast you're not proud of being rich, you feel for others its a good thing.

you can always donate to charities and give gifts to your friends and loved ones if you have enough money.

You're not spoiled if you feel guilty and if you appreciate what you have. I would only consider you spoiled if you brag about new things you have to every one around you, put down your friends because they don't have the same things, and expect things to be handed to you without working for them or earning them just because your family has money. From what you said, you don't sound like the spoiled type. You probably feel this way because you understand that you have a lot compared to some people, and that some people go through life having almost nothing. You understand the value of your items and their worth, and you don't want anyone else to feel belittled by looking at what you have and then looking at themselves. It's okay to feel that way, but you can't beat yourself up over it. It's not your fault that they don't have the same things you have, and that's okay as long as you aren't rubbing it in their face. Sure, they may be jealous of you, but aren't you ever jealous of another girl for something she has that you don't? A little bit of jealousy isn't a bad thing, it just depends on where you take it. It's okay to feel the way you do, but don't give up the things you have or say anything to your friends about it; just continue to be yourself. Appreciate what you have, try your best to earn and work for what you have, and be humble about the things you have. You have nothing to worry about.

I have the samee feeling, though i'm not very rich, but richer than most of my society
thats why i don't wear very good clothes and i won't until everyone can afford it
i hate showing someone that i have something they don't have or can't afford, it feels guilty as you said.

You don't sound spoilt to me. It is good to be aware of what you have that others don't have but you shouldn't feel guilty about it. Just don't rub it in their faces - that's when people get upset by the advantages you have.

Wait till you have it stolen and then you will feel differently about your possessions.