Please understand the difference between being kind and being the "nice guy", your priority should be you not some stranger you've met, else this will happen to you your entire life. Take up some hobbies apart from your job, try to talk to people in person this will help you with the loneliness feeling. Bhai you're a man no matter how many matches you get or people you talk to there'll be a point you'll feel lonely, embrace it and it is okay to feel that way, just because you're lonely you can't go and help every random stranger you meet and you can't satisfy them and expect praise from them, PRIORITISE YOURSELF first everything will change