Need suggestions guys

So basically there is this girl who I have liked a lot from my graduation period. We were in the same coaching. There were some other girls too who I liked but never made any move because I wasn't sure who would be good . Now this girl I've mentioned before I have been talking with her and some of her interests match mine but still I am not sure whether she would be good for me or not . I have no connection to other girls so basically you know... Now I can't bring myself to love her just because there is no one else . It will be like a fake love . And also I'm kind of emotionally unstable . Like this one moment I would like her the other moment I won't feel anything. I'm not sure but I was not like this before. Sometimes I am not sure what I am. I also have this career pressure upon me so I stay mentally exhausted all the time thinking about love and all that stuff. Idk what to do