What to do when a professor is too busy to guide my research?
If this kind of thing happened once, then I might chalk it up to chance (not everyone is friendly or professional).  But if it happens twice, then I think it is more likely that you are either not reading the situation correctly or are behaving in an unprofessional or at least strange way (and probably don't even realize it).  But it is basically impossible for strangers on the internet to figure out what precisely is going on.  After all, we've never met you, seen how you interact with people, etc.  

The only real solution is to speak with people you trust (friends, mentors, etc) who actually are eyewitnesses to what is happening and ask them for their take on it.  Even more importantly, trust them if they tell you ways that you need to change.