i am not a good person and i constantly hurt people

i broke up with my gf of 3 years because of a lot of real issues in our relationship that had boiled over a few months ago. within a couple weeks i ended up with a very attractive girls number and we truly have hit it off. the problem is, i am still so deeply in love with my ex. i thought i could handle it or something but i was wrong and i was stupid. over time me and this girl had gotten up to some nsfw activities and all of it just was far too overwhelming for me and i had to end things romantically. Now i am here. i hurt the person i love, and now ive hurt some random innocent person a long the way. and all of this, for what? to probably never get the love of my life back? i feel like a fucking peice of shit. im so tired of hurting people.