Is it normal to feel guilty for having a crush?

I tend to keep people at a distance even with friends. I am a huge perfectionist and I was raised with a lot of pressure on my shoulders. I had to be perfectly polite and correct all the time and for the most this ended up replacing any kind of social skills I could have developed.

I also believe in treating people kindly without expecting anything in return. I dont believe in befriending people for the sake of later manipulating them into having sex or being in a relationship and I find it rude when others do that to me. However a few times I developed crushes on a few of my dear friends and I felt like a huge hypocrite for it.

How could you suddenly develop emotions like that for someone you vowed to protect as your freind. I have in the past explained my moral beliefs to others about the issue and was told I was stupid. I also tend to get kind of annoyed and irritated when trying to deal with crushes, and I hate having strong emotions like that for others as it becomes a huge distractions and when you are responsible for everyone, you have no time for such distractions. So is it normal to feel horrible guilt anytime I like people?