You say you try to imitate others. Are you including mannerisms and non-verbal communication? Observe closely those you admire or find socially successful for such things. Learn to read social cues and even how to determine a person's comfort zone. All of these are significantly important in successful social interaction. Once you have observed and recognise such things practise them even in front of a mirror.

Find people with interests the same as you.

If you wish to gravitate towards others then do some homework. Find out about them and their interests.

Finally, note that a great deal of social interaction is recognising when to talk and when to stay silent. Listening is important.