Feeling low n lonely

I am a FTM my son is 8 weeks old ....he is our rainbow baby. I had a v smooth preg with everything perfect gave birth to a healthy baby ...I was v particular that within the first hr I need to breastfeed ...I did so and my baby latched on well....my milk didn't come in for 3-4 days everyone said its normal even the lactation consultant at the hospital. But v soon I realized I had a v low supply and my baby used to scream immediately after BF....I started feeling v low and a big failure...baby blues was at peak in the first couple of weeks and then on the 3rd week I had UTI with a v high fever and my supply literally dried off I started supplementing and my LO started becoming more calmer ....i kept doing both Breast n bottle and my LO was thriving and also kept trying all the possible ways to increase my supply but sadly it never went up. My son is now bottle fed he is happy but I keep feeling guilty and a failure and cry on some nights....all my Frds babies r breastfed I feel inferior in front of them and hide the fact that he is bottlefed now. My mil keeps telling everyone that I can't produce, many at times she tells my hubby that if we both need to go out...she will take care of our LO as nyway baby won't miss the mother!! I don't know what I want ask just felt like venting!!