[Linuxephus™]

People need to unload from time to time, you talk about exams so I take it you are a young man still in school/college?
Speaking from experience, you are still young and friends come and go and trust me you will make lots more throughout your life. It may not seem like it now but those "friends" of yours that disappear at the first sign of problems aren't really your friends.
Go out meet new people and maybe take up a new hobby, before you know it you'll have a new group of friends and things will start to look up.
Sorry about your exams though is there anyway you can re take them?

In addition to what Chmod's already offered, you'll find these alleged friends to be angry Not at you by any fault of your own so much as having their Expectations of you disappointed because what they Expect and Who you realistically are have thus been brought to the forefront.
We call this a reality check for the benefit of the one checked by reality. In your case, that being them, not you.
Which in turn simply means, since it has happened, it was only a matter of time before it took account of itself (infer a matter of When, not If).
Essentially, it was a given certainty.
Thus it behooves you to choose your friends more wisely rather than haphazardly to fill a void that only time can fill.