Need advice - not sure about my relationship and if I should get married to this person.

Please have patience its going to be long. I need some advice.

So I (30F) know this guy (33M) for almost an year. This year July he mentioned he is interested in me and I wasn't sure about my feelings so I said let's get to know more about eachother.

He's a caring guy. He respects me. I find him attractive, we used to talk daily but I wasn't sure if it was just a habit or love from my end.

Before when we were friends he has mentioned about his ex of 3 years (1.5y live-in) and that didn't bother me much as we were just friends.

Since when we have started dating it's me who is having issues. I know I'm wrong but i get jealous and obsessed about it most of the time and eventually cry and complain about it. I get jealous thinking at some point he has shown same love to someone else and done things with them. He has always been understanding and explains me everytime that he has no feelings for her.

I am not sure if I should continue. I don't blame him for anything and happy that he's over it, but for some reason it's me who's having problem. I hate thinking that what he's doing for me, he's done before for other girl. They planned on getting married.

I tried asking me why he likes me, he never gave me an answer until I started getting sad or asking for reassurance. I asked this question because I just wanted to make sure I'm not just any random girl he met and just wants to get settled.

There were other few things like he didn't tell me he was still in contact with his first crush. Only for to know when he was telling a random story and I figured it out. Acc to him he didn't think it was that important to tell me.

Also I'm a non drinker and non smoker And I don't have any problem with people who drinks or smokes but I would prefer a partner who's like me... He used to some weed and he has beer.

Our food habits are diff .. he comes from a vegetarian family and I love non-veg.

Also From July to oct we have had multiple fights.. it's not like we were in happy relationship.

So eventually our parents got to know and they asked us about getting married. He from his end is sure but I'm still not sure. When I think of my future.. I don't want to feel this way. I don't want to mentally suffer. I am at a place where the reality is different than what I expected.

I tried talking to him and my parents but they explain me but doesn't understand me.

Somewhere I feel it's my fault feeling this way.

TLDR: Not sure if I should get married to this person because of the issues I have with his past relationship. His eating and drinking habits. Him being in contact with his first crush and hiding it from me. Him having pictures of his ex and mentioning that was one of the best trip ( telling me it was a group pic so he wanted to have those pictures).