Male 26,

I'm working in a big four with a decent salary in Chennai. I have been in a relationship for 7 years from college. Coming to my family is kinda toxic where My parents used to put up a lot of fights and I slept on an empty stomach during the day and night for many days with tears. So I have promised myself that I don't want to give any heartbreaks to them so that they will not fight by putting me into a topic since already my family went below poverty and my parents are very much worried about what others/relative thinks. But I started talking to my gf in 1st year of college and we both liked each other and eventually I proposed and she too accepted in a day. Everything was going smooth until we exposed our love in both the home side. Thing were completely changed with my gf after that. She got fear and felt guilty about what she did and all. And our relationship has started to fade off and ended up in very critical situation where we can take it frwd or not since there is no love/bond between us. But I have warned her like this is how it'll be and things will be changed automatically in some time but she was not ready to take any suggestions what I was giving her to maintain our healthy relationship. But after 1 year her fear and guilt ness gone somehow and we become nrml as before. After that Marriage topic came in both the house. Again my gf turned to be an avoidable person since she has lot of insecurities about her as well as our future. Again same thing happened. In the last year one of my female colleagues (who is a tech person, we got connected through one incident and became close) texted me and proposed to me who is 5 years older than me.

Part - 2

I too liked her and we have shared a good vibe and bond together though we haven't met each other in person. Coming to my gf initially she only made me realise what is love and taught me abt relationships and all and made me dream abt our future since I studied in boys school. Initially and till the time when our love matter opened up in both the home side we were behaving as regular couple(huggy, kissy, late night calls and some intimacy moments also not physical) but after that none of those were not there. She hesitates to call and if I call her also she'll talk only 2 3 minutes then end the call. I lost interest in love and longing for that kind of love which I got in the early phase. But when it's coming to my colleague she is a super loving girl with lots of care. She'll always pour lots of love towards me and take care of me like anything. We started sexting and she eventually shared her private pics as well and she used to tell me like I'll do anything for you (giving bj, oral sex, 69 and other fantasy in bed) and want to have s*x with me daily and she wants me to be around her all the time and do intimacy wid her. I liked these fantasy things and sometimes I'll imagine how it'll be if we get married and doing things like this. It'll enhance my dopamine as well. I'm longing for unconditional love basically which I'm not getting it from my gf but this girl gives all of it though I didn't ask. And she used to tell that we'll get marry this year and live peaceful life. I too liked these things and I have feelings for her but when I sit and think deeply, I'll feel like I'm continuing with my office colleague because of lust only which will get fade in short period. But my love towards my gf is genuine and I know it'll not get fade away like these. Now my gf also turned to be as before and things started becoming as before between us. Now my gf is showing lots of love towards me... In my home they won't accept me to marry an elder girl than me because of bla bla reason(u know what I meant here). My colleague is telling we'll do eloped marriage since her parents also won't accept other caste marriage(age is not a pblm to her parents). She is eagerly planning to get live-in relationship wid me from may month as she'll change her base location to Chennai and do all the stuffs which she told earlier for 3 4 months and after that marriage. 
I'm in dilemma like what will happen next. Which girl I can choose and all. I know you'll curse me in comments but pls put you guys in my situation and think what would you do in that situation and give me suggestion.