Do you mind me asking why you went ahead with the second relationship given the response from your parents to the first?
I'm just curious as to your reasons.

Don't feel like you have to respond.
Loving the discussion.
My input:
My parents had an arranged marriage because they both couldn't be bothered "finding" someone themselves.
I'm open to the idea of both "types". I'm kind of lucky in that my parents are actually very supportive and quite progressive. At the moment, my decision for not dating is just that - my decision.
I've had some very, very long discussions with my parents about their relationship, the relationships of family members, their views on everything.
This is a potential middle ground Thush:
Let your parents know what you are looking for in a partner - be specific. If you let them know what you want, worst case scenario, forced marriage, but you end up with someone with qualities that you were after. We know your parents won't force you to marry someone, so that's out of the question.
But think of some of the more positive outcomes:
- Your parents introduce you to someone who you can genuinely connect with.
- You find someone that possesses the qualities that you are after, and you let your parents know about them.
I'm at a point were I'm very comfortable with the ideas around marriage, my parents roles, and how I envisage it taking place. Open, frank and honest discussions with your parents are necessary. You mentioned that your mum would prefer someone that speaks Sinhala. That's clearly a big factor for her. But it's up to YOU to decide how much of a factor it will be for you.
Bit of a messy response, sorry 'bout that.