Friend deleted me after 2 years because i'm atheist

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Pretty hard to see it that way with a person you've talked to for 2 years every day

Differences in religious beliefs is a minor thing for atheists but not for many theists.  Theism is about something they believe in which matters a great deal to them.  Atheism really isn't anything, just the lack of something.  So theists are more likely to object to forming important relationships with atheists since we challenge beliefs which are meaningful to them.  

A theist may be attracted to an atheist and honestly believe/hope the difference can be worked with.  But that is the sort of appraisal a person can get wrong.  It doesn't require dishonesty, a simple lack of self knowledge is enough.  

The differences look less important to an atheist because it involves something unimportant to them.  You just can't reasonably expect to talk a theist into agreeing that religious belief is unimportant.  Your 'truths' simply are not compatible.  

Of course not all theists hold their religion as near and dear as others do.  There are atheists on this site married to theists and making it work.  But an atheist forming an attachment to a theist has to make a judgment call about the other person's ability to accurately assess how important religion will go on being for them.

I can't really agree that gay rights are unimportant either. That doesn't mean I can't be a normal human being and keep my thoughts and opinions to myself and not attack anyone that doesn't believe what I believe.