<human>: I grew up in a stable family, but we have never been the hugs and loving type. We don't say "I love you", and we're often independent of each other on most days minus the occasional go out to eat on a weekend or birthday event. I know this isn't "romantic" love, but thought I'd put this bit in if it says anything about my issues.

I've dated girls since I was 16. Some last a few weeks, some last a year, the longest two years. Overall, I've had about 8 stable relationships of 5 months or more. Most of these coming when I started college.

The problem is, despite unconsciously hugging, kissing, holding hands, and being affectionate, I am not sure if I am ever in love. I've had all my partners at one point or another tell me that they love me, but I have never gotten there. I mean, I go the extra mile for them. In my latest relationship that lasted about 7 months, my ex ended up with a flat tire. She lives about 45 minutes from me, and I drove over and helped change her tire. So it's not like I'm being lazy in the relationships. I make sure to dress well on our dates, keep ourselves busy, while also enjoying their conversations. Everything works.

But in each relationship, I just feel I am not in love. The way they look at me, yearn for me, and are so affectionate with me pales in comparison to what I provide. When I'm not with them, I am not exactly eager to jump on my phone and start a conversation. Sometimes I can go hours upon hours without responding.

But I'm really sick of it. I hate having to break up with a girl, because I just don't see myself in love like they are. It's not like we fought or had radical different beliefs. We got along well, had a lot in common, but something just didn't "click" in my head. I would like to know what's preventing me from falling in love?

Can you summarize the given text in a few sentences?
<bot>: Several successful relationships in the past. However, never fallen in love, and leads to breakup. Tired of not being able to fall in love.