Talking to my ex again. Mixed feelings.

hey guys. Really need some help here. Its hell in my head. Met my ex gf in college, we fell in love and had a great relationship. were together for over 2 years but things got really difficult after school, we couldnt see each other much and it was just hard for us and she broke up with me 8 months after school ended.

When we were together things were great, we got along really well, talked all the time and became so close we were best friends and loved each other alot. Those two years we were together were the best years of our lives and it just sucked that it had to end.

After we broke up we never really talked much. we broke up last year around this time. And she messaged me last month and we have been talking on and off ever since.

she talks hot and cold sometimes, and we talked over the phone a few times but not in a few days.
Honestly speaking i still have feelings for her, she meant alot to me and i loved her alot, we were extremely close and it was hard when things ended.

when we talk we reminisce alot, says she misses how things use to be, how she wish she could go back to those times we had and stuff and told a friend of mine she missed me also. We've been talking for about a month now. Never talked about reconciliation.

we never really went out when we were together because we never really could of because of her parents and stuff, so we spend every day together in school. we enjoyed spending time together and talking and i do miss her. we had a really strong bond and were always there for each other, that made us more close.

i asked her out but she says when shes ready, i wasnt really dissapointed because like i said we never really went out. she says she'll come by sometime because she also has some things to drop for me.

I want to tell her how i feel. id like to tell her i still think about her everyday, and the time i had with her were the best and happiest times of my life, i never felt that way before in my life i only felt that way when i was with her. and now that some times gone by i knew what we had and it was the best thing i ever had and if we could do it again, i would like to.

Is easier now because we are talking again and im just not sure when to tell her.

do i tell her soon or after she visits me, im not too sure when she'll come by. My heads going crazy with thoughts. If i could try again with her id love that because the times we had were the best and happiest times of my life.

So what do i say guys?
and when do i say it?