Well how about you trust your parrents these worries? They propably love you since they allow to stay with them for 5 months. Let them closer. And how about you learn to sustain easier form or relationship like friendship before you try get a boyfriend? Otherwise its like trying to carry something that you cant lift.
Your confidence will be higher if you return to work. Its the creativity that gives the selfesteem.
You said that you been exercising every day last 4 months. Can you do it together with like minded people? Is there a gym where you live? A trainer? You could benefit from being together with people who shares and supports same passion as you.
Doubt kills more dreams than failure ever will